...December 16, 2021 - We have reviewed our ratings on six major financial institution groups in Japan under our revised criteria. - We have affirmed the ratings on these institutions, and the outlooks are unchanged. TOKYO (S&P Global Ratings) Dec. 17, 2021--S&P Global Ratings today said that it has affirmed its issuer and issue credit ratings on the following six major financial institution groups and their core subsidiaries. The affirmations follow a revision to our criteria for rating banks and nonbank financial institutions and for determining a Banking Industry Country Risk Assessment (BICRA) (see "Financial Institutions Rating Methodology," published Dec. 9, 2021, and "Banking Industry Country Risk Assessment Methodology And Assumptions," published Dec. 9, 2021). The groups subject to the affirmations are led by: - Mitsubishi UFJ Financial Group Inc. (MUFG) - Sumitomo Mitsui Financial Group Inc. (SMFG) - Mizuho Financial Group Inc. (Mizuho) - Sumitomo Mitsui Trust Holdings Inc.(SMTH)...