Non-trading investments (Tables)
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12 Months Ended |
Mar. 31, 2026 |
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| Investments, Debt and Equity Securities [Abstract] |
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| Summary of AFS debt securities |
The following table presents the amortized cost and fair value of major types of AFS debt securities as well as cumulative unrealized gains and unrealized losses recognized through Accumulated other comprehensive income (loss) since acquisition as of March 31, 2025 and 2026.
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Japanese government securities |
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¥ |
25,001 |
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¥ |
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¥ |
(187 |
) |
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¥ |
24,814 |
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Japanese agency and municipal securities |
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81,913 |
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19 |
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(1,495 |
) |
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80,437 |
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Bank and corporate debt securities |
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1,790 |
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(11 |
) |
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1,779 |
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¥ |
108,704 |
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¥ |
19 |
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¥ |
(1,693 |
) |
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¥ |
107,030 |
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Japanese government securities |
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¥ |
99,977 |
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¥ |
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¥ |
(493 |
) |
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¥ |
99,484 |
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Japanese agency and municipal securities |
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160,639 |
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(4,129 |
) |
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156,510 |
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Bank and corporate debt securities |
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15,636 |
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(286 |
) |
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15,350 |
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¥ |
276,252 |
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¥ |
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¥ |
(4,908 |
) |
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¥ |
271,344 |
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| (1) |
No allowances for credit losses have been recognized as of March 31, 2025 and 2026. |
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| Summary of AFS debt securities categorized by remaining contractual maturity |
The following table presents the amortized cost and fair value of major types of AFS debt securities, categorized by contractual maturity as of March 31, 2025 and 2026.
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Japanese government securities |
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less than 1 year |
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¥ |
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¥ |
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¥ |
19,997 |
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¥ |
19,961 |
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25,001 |
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24,814 |
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79,980 |
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79,523 |
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¥ |
25,001 |
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¥ |
24,814 |
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¥ |
99,977 |
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¥ |
99,484 |
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Japanese agency and municipal securities |
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less than 1 year |
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¥ |
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¥ |
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¥ |
1,395 |
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¥ |
1,387 |
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81,913 |
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80,437 |
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159,244 |
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155,123 |
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¥ |
81,913 |
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¥ |
80,437 |
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¥ |
160,639 |
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¥ |
156,510 |
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Bank and corporate debt securities |
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¥ |
1,790 |
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¥ |
1,779 |
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¥ |
15,636 |
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¥ |
15,350 |
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¥ |
1,790 |
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¥ |
1,779 |
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¥ |
15,636 |
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¥ |
15,350 |
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¥ |
108,704 |
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¥ |
107,030 |
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¥ |
276,252 |
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¥ |
271,344 |
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| (1) |
No allowances for credit losses have been recognized as of March 31, 2025 and 2026 . |
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| Summary of AFS debt securities in an unrealized loss position |
The following table presents the fair value of major types of AFS debt securities that are in an unrealized loss position as of March 31, 2025 and 2026, and the duration of the unrealized loss status. An unrealized loss exists where the fair value of an individual AFS debt securities is less than its amortized cost basis.
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Japanese government securities |
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Less than 12 months |
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¥ |
24,814 |
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¥ |
(187 |
) |
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4 |
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¥ |
74,665 |
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¥ |
(311 |
) |
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8 |
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12 months or longer |
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— |
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— |
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— |
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24,819 |
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(182 |
) |
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4 |
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¥ |
24,814 |
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¥ |
(187 |
) |
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4 |
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¥ |
99,484 |
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¥ |
(493 |
) |
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12 |
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Japanese agency and municipal securities |
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Less than 12 months |
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¥ |
68,063 |
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¥ |
(1,495 |
) |
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72 |
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¥ |
89,242 |
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¥ |
(1,828 |
) |
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80 |
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12 months or longer |
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— |
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— |
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— |
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67,268 |
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(2,301 |
) |
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72 |
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¥ |
68,063 |
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¥ |
(1,495 |
) |
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72 |
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¥ |
156,510 |
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¥ |
(4,129 |
) |
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152 |
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Bank and corporate debt securities |
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Less than 12 months |
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¥ |
1,779 |
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¥ |
(11 |
) |
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3 |
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¥ |
13,485 |
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¥ |
(260 |
) |
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28 |
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12 months or longer |
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— |
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— |
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— |
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1,865 |
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(26 |
) |
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3 |
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¥ |
1,779 |
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¥ |
(11 |
) |
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3 |
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¥ |
15,350 |
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¥ |
(286 |
) |
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31 |
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¥ |
94,656 |
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¥ |
(1,693 |
) |
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|
79 |
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¥ |
271,344 |
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¥ |
(4,908 |
) |
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195 |
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