v3.26.1
Investment Securities (Tables)
 12 Months Ended
Mar. 31, 2026
Investments, Debt and Equity Securities [Abstract]  
Amortized Cost, Gross Unrealized Gains (Losses) and Fair Value of Investment Securities
The following tables present the amortized cost, gross unrealized gains and losses, and fair value of Available-for-sale debt securities and Held-to-maturity debt securities at March 31, 2025 and 2026:
At March 31, 2025
Amortized
 cost
 
Gross
 unrealized
 gains
 
Gross
 unrealized
 losses
 Fair value
 (in millions)
Available-for-sale debt securities:       
Japanese national government and Japanese government agency bonds¥22,314,148 ¥2,326 ¥232,617 ¥22,083,857 
Japanese prefectural and municipal bonds319,774 3 9,779 309,998 
Foreign government and official institution bonds4,149,418 11,679 82,628 4,078,469 
Corporate bonds905,194 10,213 11,524 903,883 
Residential mortgage-backed securities1,121,879 583 211 1,122,251 
Asset-backed securities1,405,859 7,491 1,199 1,412,151 
Other debt securities502,359 3,709 3,509 502,559 
Total¥30,718,631 ¥36,004 ¥341,467 ¥30,413,168 
Held-to-maturity debt securities:
Japanese national government and Japanese government agency bonds¥14,354,434 ¥4 ¥395,239 ¥13,959,199 
Japanese prefectural and municipal bonds2,545,627 — 93,141 2,452,486 
Corporate bonds214,949 — 3,602 211,347 
Residential mortgage-backed securities4,690,277 10,826 148,066 4,553,037 
Asset-backed securities1,466,898 4,447 421 1,470,924 
Total¥23,272,185 ¥15,277 ¥640,469 ¥22,646,993 

At March 31, 2026:
Amortized
 cost
 
Gross
 unrealized
 gains
 
Gross
 unrealized
 losses
 Fair value
 (in millions)
Available-for-sale debt securities:       
Japanese national government and Japanese government agency bonds¥14,179,972 ¥124 ¥263,553 ¥13,916,543 
Japanese prefectural and municipal bonds177,037 1 10,587 166,451 
Foreign government and official institution bonds4,646,116 14,579 61,469 4,599,226 
Corporate bonds989,473 9,756 17,969 981,260 
Residential mortgage-backed securities1,015,934 1,197 109 1,017,022 
Asset-backed securities1,590,991 9,585 254 1,600,322 
Other debt securities351,950 3,612 2,045 353,517 
Total¥22,951,473 ¥38,854 ¥355,986 ¥22,634,341 
Held-to-maturity debt securities:
Japanese national government and Japanese government agency bonds¥16,590,035 ¥— ¥849,169 ¥15,740,866 
Japanese prefectural and municipal bonds2,847,328 — 165,266 2,682,062 
Corporate bonds243,772 — 6,061 237,711 
Residential mortgage-backed securities4,488,121 25,121 124,695 4,388,547 
Asset-backed securities1,843,305 3,342 2,603 1,844,044 
Total¥26,012,561 ¥28,463 ¥1,147,794 ¥24,893,230 
Amortized Cost and Fair Value by Contractual Maturity Debt securities not due at a single maturity date and securities embedded with call or prepayment options, such as mortgage-backed securities, are included in the table below based on their contractual maturities.
 
Held-to-maturity debt
 securities
 
Available-for-sale
 debt securities
 
Amortized
 cost
 Fair value Fair value
 (in millions)
Due in one year or less¥2,957,549 ¥2,936,497 ¥13,922,146 
Due from one year to five years6,009,650 5,821,162 4,031,750 
Due from five years to ten years10,106,082 9,421,512 3,382,039 
Due after ten years6,939,280 6,714,059 1,298,406 
Total¥26,012,561 ¥24,893,230 ¥22,634,341 
Investments by Length and Category in Continuous Loss Position
The following tables show the gross unrealized losses and fair value of Available-for-sale debt securities at March 31, 2025 and 2026 by length of time that individual securities in each category have been in a continuous loss position:
 Less than 12 months 12 months or more Total
At March 31, 2025Fair value 
Gross
 unrealized
 losses
 Fair value 
Gross
 unrealized
 losses
 Fair value 
Gross
 unrealized
 losses
 Number of securities
 (in millions, except number of securities)
Available-for-sale debt securities:             
Japanese national government and Japanese government agency bonds¥19,809,049 ¥109,736 ¥1,160,183 ¥122,881 ¥20,969,232 ¥232,617 311
Japanese prefectural and municipal bonds30,167 82 279,731 9,697 309,898 9,779 282
Foreign government and official institution bonds710,517 9,198 1,584,560 73,430 2,295,077 82,628 104
Corporate bonds206,591 3,069 413,226 8,455 619,817 11,524 483
Residential mortgage-backed securities— — 274,894 211 274,894 211 9
Asset-backed securities244,037 1,193 1,252 6 245,289 1,199 25
Other debt securities213,737 423 48,799 3,086 262,536 3,509 74
Total¥21,214,098 ¥123,701 ¥3,762,645 ¥217,766 ¥24,976,743 ¥341,467 1,288
 Less than 12 months 12 months or more Total
At March 31, 2026:Fair value 
Gross
 unrealized
 losses
 Fair value 
Gross
 unrealized
 losses
 Fair value 
Gross
 unrealized
 losses
 Number of securities
 (in millions, except number of securities)
Available-for-sale debt securities:             
Japanese national government and Japanese government agency bonds¥11,646,480 ¥22,273 ¥1,671,333 ¥241,280 ¥13,317,813 ¥263,553 252
Japanese prefectural and municipal bonds— — 166,380 10,587 166,380 10,587 202
Foreign government and official institution bonds1,128,963 8,090 1,271,358 53,379 2,400,321 61,469 105
Corporate bonds203,323 3,914 456,324 14,055 659,647 17,969 479
Residential mortgage-backed securities— — 113,974 109 113,974 109 5
Asset-backed securities55,271 212 9,509 42 64,780 254 14
Other debt securities171,466 70 57,890 1,975 229,356 2,045 52
Total¥13,205,503 ¥34,559 ¥3,746,768 ¥321,427 ¥16,952,271 ¥355,986 1,109
Net Realized Gains (Losses) on Sales of Equity Securities and Net Unrealized Gains (Losses) on Equity Securities Still Held at the Reporting Date
The following table presents net realized gains (losses) on sales of equity securities, and net unrealized gains (losses) on equity securities still held at March 31, 2024, 2025 and 2026:
 
Fiscal years ended
 March 31,
 202420252026
 (in millions)
Net gains (losses) recognized during the period(1)
¥1,527,792 ¥(674,282)¥983,840 
Less:
Net gains (losses) recognized during the period on equity securities sold during the period113,216 (107,892)151,388 
Net unrealized gains (losses) recognized during the reporting period still held at the reporting date¥1,414,576 ¥(566,390)¥832,452 
Note:
(1)Included in Investment securities gains (losses)—net.
Carrying Value of Nonmarketable Equity Securities
The following table presents the carrying value of nonmarketable equity securities that are measured at cost minus impairment, if any, plus or minus changes resulting from observable price changes (“measurement alternative”), held at March 31, 2025 and 2026:
 20252026
 (in millions)
Measurement alternative balance¥603,633 ¥647,115 
Related Adjustments for Nonmarketable Equity Securities
The related adjustments for these securities for the fiscal years ended March 31, 2024, 2025 and 2026 were as follows:
 
Fiscal years ended
 March 31,
 202420252026
 
(in millions)
Measurement alternative impairment losses(1)(4)
¥(11,943)¥(37,469)¥(22,633)
Measurement alternative downward changes for observable prices(1)(2)(3)(5)
¥(1,567)¥— ¥— 
Measurement alternative upward changes for observable prices(1)(2)(3)(6)
¥882 ¥8,060 ¥12,222 
Notes:
(1)Included in Investment securities gains (losses)—net.
(2)Under the measurement alternative, nonmarketable equity securities are carried at cost plus or minus changes resulting from observable prices in orderly transactions for the identical or a similar investment of the same issuer.
(3)The MUFG Group applied measurement alternative downward or upward changes to certain nonmarketable equity securities, resulting from observable prices in orderly transactions, such as partial repurchase and transactions by other entities.
(4)The cumulative impairment losses at March 31, 2025 and 2026 were ¥65,989 million and ¥85,549 million, respectively.
(5)The cumulative downward changes for observable prices at March 31, 2025 and 2026 were ¥2,961 million and ¥2,961 million, respectively.
(6)The cumulative upward changes for observable prices at March 31, 2025 and 2026 were ¥66,132 million and ¥77,877 million, respectively.