v3.26.1
Earnings per share - Earnings per share (Basic and Diluted) (Detail) - JPY (¥)
¥ / shares in Units, ¥ in Millions, shares in Millions
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Basic—      
Net income attributable to NHI shareholders ¥ 362,129 ¥ 340,736 ¥ 165,863
Weighted average number of NHI shares outstanding 2,942,280,410 2,955,204,882 3,017,128,412
Net income attributable to NHI shareholders per share ¥ 123.08 ¥ 115.3 ¥ 54.97
Diluted—      
Net income attributable to NHI shareholders ¥ 361,871 ¥ 340,463 ¥ 165,701
Weighted average number of NHI shares outstanding 3,041,190,068 3,066,458,811 3,144,540,974
Net income attributable to NHI shareholders per share ¥ 118.99 ¥ 111.03 ¥ 52.69