Form 6-K Filing Summary

Mizuho Financial Group, Inc. has issued a Form 6-K report for May 2026. The report addresses news articles published by Yomiuri Shimbun regarding a potential investment in Rakuten Bank, Ltd. Mizuho Financial Group clarifies that while they are exploring various examinations, including the possibility of investing in Rakuten Bank, no decision has been made at this time. This exploration is in line with a previous announcement made by Rakuten Group, Inc. and Rakuten Bank on February 25, 2026, concerning the reorganization of Rakuten's FinTech business. Mizuho Financial Group states that they will disclose any pertinent information in a timely and appropriate manner once a decision is made. The filing was signed by Makoto Samejima, Senior Managing Corporate Executive and Group CFO, on May 18, 2026.