$1,000,000,000 4.592% Senior Callable Fixed-to-Fixed Reset Rate Notes due April18 , 2030$500,000,000 Senior Callable Floating Rate Notes due April21, 2032$1,250,000,000 4.847% Senior Callable Fixed-to-Fixed Reset Rate Notes due April 21, 2032$1,500,000,000 5.325% Senior Callable Fixed-to-Fixed Reset Rate Notes due April 21, 2037$1,250,000,000 5.868% Senior Callable Fixed-to-Fixed Reset Rate Notes due April 21, 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 April21, 2032, or the floating rate notes, will bear interest from (and including) April21, 2026 to (but excluding) April21, 2032 at a floating rate, payable quarterly inarrears on January21, April21, July21 and October21 of each year, with the first interest payment to be made on July21, 2026, each subject to adjustments. The interest rate on the floating rate notes for each interestperiod will be a per annum rate equal to Compounded Daily SOFR (as defined below), plus 1.19%, to be determined as described under “Description of the Notes—Floating Rate Notes.”The senior callable fixed-to-fixed reset rate notes due April18 , 2030, or the 4-year notes, the senior callable fixed-to-fixed reset rate notes due April21, 2032, or the 6-year notes, the senior callable fixed-to-fixed reset rate notes due April21, 2037, or the 11-year notes, and the senior callable fixed-to-fixed reset rate notes due April21, 2047, or the 21-year notes, will bear interest from (and including) April21, 2026 to (but excluding)the applicable Reset Date, which, with respect to the 4-year notes, is April 18 of the year immediately preceding the maturity date and, with respect to the 6-year notes, the 11-year notes and the 21-year notes, isApril21 of the year immediately preceding the applicable maturity date, at the fixed per annum rate listed above, payable, with respect to the 4-year notes, semi-annually in arrears on April18 and October18 of eachyear, with the first interest payment to be made on October18, 2026 (short first coupon), and, with respect to the 6-year notes, the 11-year notes and the 21-year notes, semi-annually in arrears on April21 andOctober21 of each year, with the first interest payment to be made on October21, 2026. 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 the applicable U.S.Treasury Rate (as defined below) as determined by the calculation agent on the applicable Reset Determination Date (as defined below), plus 0.78% on the 4-year notes, 0.92% on the 6-year notes, 1.02% on the 11-year notes and 0.98% on the 21-year notes, respectively, payable, with respect to the 4-year notes, semi-annually in arrears on October18 and April18 immediately following the applicable Reset Date, and, withrespect to the 6-year notes, the 11-year notes and the 21-year notes, semi-annually in arrears on October21 and April21 immediately following the applicable Reset 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 principal amount 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 ouroption 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 upon the occurrence of certain tax events,subject to certain conditions. See “Description of Senior Debt Securities—Optional Redemption and Repurchases—Optional Tax Redemption” in the accompanying prospectus. 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 our seniorunsecured 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 Debt Securities” in theaccompanying prospectus. We have made an application to the Luxembourg Stock Exchange to list the Notes on the official list of the Luxembourg Stock Exchange and for the Notes to be admitted to trading on the Luxembourg Stock Exchange’sEuro MTF Market. The Luxembourg Stock Exchange’s Euro MTF Market is not a regulated market for the purposes of Directive 2014/65/EU. This prospectus supplement with the accompanying prospectus constitutesthe listing prospectus for purposes of Part IV of the Luxembourg law on prospectuses for securities dated July16, 2019. This pro