Notes - Segment Information, Etc.
| Concept | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||
| Segment information | ||||||||||
| Disclosure of sales, profit (loss), asset, liability, and other items for each reportable segment | ||||||||||
| Sales | ||||||||||
| Revenues from external customers | 
                                                2,495,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,607,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,285,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,103,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,078,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,147,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,866,401,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,878,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,238,392,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,626,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                808,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,337,805,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,625,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,465,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,963,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,970,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                730,305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,264,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                412,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                469,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,595,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                736,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                976,052,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                639,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,116,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,609,262,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                420,744,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                433,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                190,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                197,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,037,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                783,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                865,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                810,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                977,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,442,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                159,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                495,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |