v3.26.3
Segment Information (Reconciliation of Segment Totals to Consolidated Financial Statement Amounts) (Detail) - JPY (¥)
¥ in Millions
 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Segment revenues:    
Revenues ¥ 1,673,875 ¥ 1,527,599
Segment profits:    
Total profits for segments 239,520 230,424
Net Income before Income Taxes Attributable to Noncontrolling Interests and Redeemable Noncontrolling Interests 280 (73)
Income from Continuing Operations before Income Taxes 1,117,880 378,951
Operating Segment    
Segment revenues:    
Revenues 1,672,768 1,527,526
Segment profits:    
Total profits for segments 1,147,389 397,845
Corporate, Non-Segment    
Segment revenues:    
Revenues 42,797 38,104
Segment profits:    
Corporate profits (losses) (35,559) (23,140)
Net Income before Income Taxes Attributable to Noncontrolling Interests and Redeemable Noncontrolling Interests 6,050 4,246
Intersegment Eliminations    
Segment revenues:    
Revenues ¥ (41,690) ¥ (38,031)