v3.26.1
Research and Development (Tables)
12 Months Ended
Mar. 31, 2026
TextBlock1 [Abstract]  
Summary of Research and Development Costs
Research and development costs for the years ended March 31, 2024, 2025 and 2026 consist of the following:
 

 
  
Yen (millions)
 
 
  
2024
 
 
2025
 
 
2026
 
Research and development expenditures incurred during the reporting period
   ¥ 976,366     ¥ 1,210,620     ¥ 1,174,848  
Amount capitalized
     (207,519     (287,098     (198,806
Amortization, impairment losses and losses on disposal of capitalized development costs
     154,780       175,960       564,604  
  
 
 
   
 
 
   
 
 
 
Total
   ¥ 923,627     ¥ 1,099,482     ¥ 1,540,646