Quarterly Statement Of Cash Flows
| Concept | 2023-07-01 to 2024-06-30 | As at 2024-06-30 | As at 2023-06-30 | 2022-07-01 to 2023-06-30 | As at 2022-06-30 | 
|---|---|---|---|---|---|
| Quarterly statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | 
                                                1,453,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,126,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | 
                                                1,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | 
                                                -4,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -4,585,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | 
                                                -447,637,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -562,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | 
                                                1,003,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                561,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -92,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -26,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of property, plant and equipment | 
                                                258,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                285,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | 
                                                -136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of investment securities | 
                                                250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | 
                                                7,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                70,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -100,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Proceeds from short-term borrowings | 
                                                80,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from long-term borrowings | 
                                                1,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | 
                                                -258,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -274,603,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | 
                                                -55,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -25,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | 
                                                -273,796,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -175,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | 
                                                -6,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -9,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                534,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                472,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                7,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                1,614,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                941,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                5,915,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,300,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,379,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |