Quarterly Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Quarterly consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                7,905,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,285,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Merchandise and finished goods | 
                                                1,765,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,819,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                775,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                931,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                1,443,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,585,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                568,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                524,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -60,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -66,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                20,601,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,925,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                40,165,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,760,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | — | — | 
| Buildings and structures, net | 
                                                10,524,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,994,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                10,008,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,008,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                205,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                627,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                1,323,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,408,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                1,041,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                802,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                5,304,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,098,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Allowance for doubtful accounts | 
                                                -213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -223,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                46,511,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,661,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                67,113,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,586,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                2,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                1,462,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,382,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                670,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,070,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                18,272,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,212,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                357,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                1,345,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,318,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                794,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                768,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                57,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                2,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,502,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                20,676,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,715,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,545,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,545,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                2,776,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,776,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                42,138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,652,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -316,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                46,144,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,658,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                251,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                168,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                20,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                292,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                212,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                46,436,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,870,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                67,113,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,586,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |