v3.25.2
Investment Securities (Tables)
 12 Months Ended
Mar. 31, 2025
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, 2024 and 2025:
At March 31, 2024 (As Adjusted):
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¥23,287,730 ¥5,768 ¥126,098 ¥23,167,400 
Japanese prefectural and municipal bonds1,055,564 227 9,800 1,045,991 
Foreign government and official institution bonds3,428,199 4,981 130,629 3,302,551 
Corporate bonds1,019,832 10,685 4,049 1,026,468 
Residential mortgage-backed securities1,229,615 255 345 1,229,525 
Asset-backed securities1,239,772 9,251 1,877 1,247,146 
Other debt securities407,917 3,419 7,450 403,886 
Total¥31,668,629 ¥34,586 ¥280,248 ¥31,422,967 
Held-to-maturity debt securities:
Japanese national government and Japanese government agency bonds¥15,191,741 ¥4,745 ¥97,603 ¥15,098,883 
Japanese prefectural and municipal bonds1,999,182 2,048 16,328 1,984,902 
Corporate bonds119,490 93 179 119,404 
Residential mortgage-backed securities4,952,083 3,153 179,537 4,775,699 
Asset-backed securities2,581,466 3,681 6,521 2,578,626 
Total¥24,843,962 ¥13,720 ¥300,168 ¥24,557,514 

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 
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¥1,854,284 ¥1,849,185 ¥18,392,937 
Due from one year to five years7,726,350 7,577,814 5,630,447 
Due from five years to ten years7,644,200 7,321,116 2,850,932 
Due after ten years6,047,351 5,898,878 3,538,852 
Total¥23,272,185 ¥22,646,993 ¥30,413,168 
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, 2024 and 2025 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, 2024 (As Adjusted):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¥18,640,364 ¥9,427 ¥1,756,792 ¥116,671 ¥20,397,156 ¥126,098 440
Japanese prefectural and municipal bonds416,047 1,502 520,133 8,298 936,180 9,800 574
Foreign government and official institution bonds358,973 9,306 1,942,369 121,323 2,301,342 130,629 97
Corporate bonds167,004 467 442,274 3,582 609,278 4,049 309
Residential mortgage-backed securities185,197 14 343,621 331 528,818 345 14
Asset-backed securities23,810 9 160,109 1,868 183,919 1,877 17
Other debt securities202,787 54 64,908 7,396 267,695 7,450 56
Total¥19,994,182 ¥20,779 ¥5,230,206 ¥259,469 ¥25,224,388 ¥280,248 1,507
 Less than 12 months 12 months or more Total
At March 31, 2025: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¥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
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, 2023, 2024 and 2025:
 
Fiscal years ended
 March 31,
 2023
(As Adjusted)		2024
(As Adjusted)		2025
 (in millions)
Net gains (losses) recognized during the period(1)
¥102,415 ¥1,527,792 ¥(674,282)
Less:
Net gains (losses) recognized during the period on equity securities sold during the period18,228 113,216 (107,892)
Net unrealized gains (losses) recognized during the reporting period still held at the reporting date¥84,187 ¥1,414,576 ¥(566,390)
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, 2024 and 2025:
 2024
(As Adjusted)		2025
 (in millions)
Measurement alternative balance¥483,218 ¥603,633 
Related Adjustments for Nonmarketable Equity Securities
The related adjustments for these securities for the fiscal years ended March 31, 2023, 2024 and 2025 were as follows:
 
Fiscal years ended
 March 31,
 202320242025
 
(in millions)
Measurement alternative impairment losses(1)(4)
¥(8,230)¥(11,943)¥(37,469)
Measurement alternative downward changes for observable prices(1)(2)(3)(5)
¥(440)¥(1,567)¥— 
Measurement alternative upward changes for observable prices(1)(2)(3)(6)
¥5,090 ¥882 ¥8,060 
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, 2024 and 2025 were ¥29,569 million and ¥65,989 million, respectively.
(5)The cumulative downward changes for observable prices at March 31, 2024 and 2025 were ¥2,961 million and ¥2,961 million, respectively.
(6)The cumulative upward changes for observable prices at March 31, 2024 and 2025 were ¥58,104 million and ¥66,132 million, respectively.