v3.26.1
Financial Instruments - Schedule of Impact on Profit or Loss Before Tax and Shareholders's Equity from Net Financial Assets of Interest Rate and Fair Value Fluctuations (Details) - JPY (¥)
¥ in Millions
 12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2023
Disclosure of risk management strategy related to hedge accounting [line items]        
Profit before tax ¥ 79,945 ¥ 34,961 ¥ 11  
Total shareholders' equity 430,761 223,731 ¥ 191,251 ¥ 191,540
Interest Rate Fluctuations        
Disclosure of risk management strategy related to hedge accounting [line items]        
Profit before tax 23,111 18,085    
Total shareholders' equity 15,947 12,500    
Fair Value Fluctuation of Interest by 100 Basis Points        
Disclosure of risk management strategy related to hedge accounting [line items]        
Change of fair value in fluctuation of interest ¥ 11,155 ¥ 9,225