Mitsubishi UFJ Financial Group, Inc. $400,000,000 Senior Callable Floating Rate Notes due July 24, 2030$500,000,000 4.980% Senior Callable Fixed-to-Fixed Reset Rate Notes due July24, 2030$500,000,000 Senior Callable Floating Rate Notes due July23, 2032$600,000,000 5.190% Senior Callable Fixed-to-Fixed Reset Rate Notes due July 23, 2032$500,000,000 5.568% Senior Callable Fixed-to-Fixed Reset Rate Notes due July 24, 2037$500,000,000 6.049% Senior Callable Fixed-to-Fixed Reset Rate Notes due July 24, 2047 Mitsubishi UFJ Financial Group, Inc., or MUFG, expects to issue the above-listed senior notes, or, collectively, the Notes, pursuant to a senior indenture, dated March1, 2016, or the Indenture.The senior callable floating rate notes due July24, 2030, or the 4-year floating rate notes, and the senior callable floating rate notes due July 23, 2032, or the 6-year floating rate notes, will bear interestfrom (and including) July 24, 2026 to (but excluding) July24, 2030 and July 23, 2032, respectively, at a floating rate, payable quarterly in arrears, with respect to the 4-year floating rate notes, onJanuary24, April24, July24 and October24 of each year, subject to adjustments, with the first interest payment to be made on October 24, 2026, and, with respect to the 6-year floating rate notes, onJanuary 23, April 23, July 23 and October 23 of each year, subject to adjustments, with the first interest payment to be made on October 23, 2026 (short first coupon). The interest rates on the 4-yearfloating rate notes and the 6-year floating rate notes for each interest period will be a per annum rate equal to Compounded Daily SOFR (as defined below), plus 0.84% and 1.07%, respectively, to bedetermined as described under “Description of the Notes—Floating Rate Notes.” The senior callable fixed-to-fixed reset rate notes due July 24, 2030, or the 4-year notes, the senior callable fixed-to-fixed reset rate notes due July 23, 2032, or the 6-year notes, the senior callable fixed-to-fixed reset rate notes due July 24, 2037, or the 11-year notes, and the senior callable fixed-to-fixed reset rate notes due July 24, 2047, or the 21-year notes, will bear interest from (and including) July24, 2026 to (but excluding) the applicable Reset Date, which, with respect to the 4-year notes, the 11-year notes and the 21-year notes, is July24 of the year immediately preceding the applicable maturitydate, and, with respect to the 6-year notes, is July23 of the year immediately preceding the maturity date, at the fixed per annum rate listed above, payable, with respect to the 4-year notes, the 11-yearnotes and the 21-year notes, semi-annually in arrears on January24 and July24 of each year, with the first interest payment to be made on January 24, 2027, and, with respect to the 6-year notes, semi-annually in arrears on January 23 and July 23 of each year, with the first interest payment to be made on January 23, 2027 (short first coupon). Each series of the fixed-to-fixed reset rate notes will bear interest from (and including) the applicable Reset Date to (but excluding) the applicable maturity date at a fixed per annum rate equal to theapplicable U.S. Treasury Rate (as defined below) as determined by the calculation agent on the applicable Reset Determination Date (as defined below), plus 0.67% on the 4-year notes, 0.82% on the 6-year notes, 0.95% on the 11-year notes and 0.93% on the 21-year notes, respectively, payable, with respect to the 4-year notes, the 11-year notes and the 21-year notes, semi-annually in arrears onJanuary 24 and July24 immediately following the applicable Reset Date, and, with respect to the 6-year notes, semi-annually in arrears on January 23 and July 23 immediately following the applicableReset Date. We may at our option and in our sole discretion redeem a series of Notes in whole, but not in part, on the date that is one year prior to the maturity date of such series of Notes at 100% of their principalamount plus any accrued and unpaid interest to (but excluding) the date of redemption, subject to certain conditions. See “Description of the Notes—Optional Redemption” in this prospectus supplement.In addition, we may at our option redeem a series of Notes in whole, but not in part, at 100% of their principal amount plus any accrued and unpaid interest to (but excluding) the date of redemption uponthe occurrence of certain tax events, subject to certain conditions. See “Description of Senior Debt Securities—Optional Redemption and Repurchases—Optional Tax Redemption” in the accompanyingprospectus. The Notes are intended to qualify as external total loss-absorbing capacity, or External TLAC, debt under the Japanese TLAC Standard (as defined in the accompanying prospectus). The Notes will be oursenior unsecured obligations but will be structurally subordinated to the liabilities of MUFG’s subsidiaries. See “Risk Factors—Risks Related to the Debt Securities” and “Description of Senior DebtSecurities” in the accompa