Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                5,143,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,951,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                1,048,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                936,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                174,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                144,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                272,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                225,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -5,537,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,214,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                9,804,318,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,806,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                82,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                2,709,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,720,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,344,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,344,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets, net | 
                                                15,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                2,047,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery and equipment | 
                                                768,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                741,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -616,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -580,219,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Machinery and equipment, net | 
                                                151,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                161,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Own-used assets | ||
| Leased assets | 
                                                90,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                90,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -75,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -71,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures | 
                                                643,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                588,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -491,908,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -456,973,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures, net | 
                                                151,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                131,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                20,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                11,824,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,971,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | 
                                                2,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Telephone subscription right | 
                                                6,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other intangible assets | ||
| Investments and other assets | ||
| Investment securities | 
                                                5,961,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,296,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                8,180,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,305,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                141,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                229,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                28,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -11,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -11,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                10,909,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,053,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | — | — | 
| Other assets | ||
| Assets | 
                                                20,714,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,859,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Non-current liabilities | ||
| Non-current liabilities | 
                                                1,054,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,065,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                52,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                12,791,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                108,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term guarantee deposits | 
                                                272,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                270,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,566,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,263,223,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                191,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                169,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                91,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accrued consumption taxes | 
                                                55,657,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received | 
                                                4,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,218,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deposits received | 
                                                116,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,410,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                32,872,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | ||
| Lease liabilities | 
                                                6,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deposits received | ||
| Provision for bonuses | 
                                                35,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                111,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Liabilities | 
                                                3,620,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,328,856,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                16,256,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,823,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                1,290,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,290,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                1,210,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,210,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                13,934,535,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,500,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -179,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -178,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                434,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                309,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation difference on available-for-sale securities | 
                                                434,006,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                309,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                17,093,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,530,765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                20,714,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,859,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Valuation and translation adjustments | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings |