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Investment in Securities (Information About Impairment and Upward or Downward Adjustments Resulting From Observable Price Changes) (Detail) - Equity security - JPY (¥) ¥ in Millions | 12 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Schedule Of Gain Loss On Investments Held At Cost Balance Sheet and Income Statement Reported Amounts Summary [Line Items] |  |
Carrying value | ¥ 89,554 | ¥ 96,714
Accumulated impairments and downward adjustments | (16,955) | (16,171)
Accumulated upward adjustments | 3,643 | 2,201
Impairments and downward adjustments | (1,438) | (774)
Upward adjustments | ¥ 1,485 | ¥ 1,185

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- Definition Equity Securities Accumulated Upward Adjustments. + References No definition available. + Details
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- Details
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