Mitsubishi Tokyo Financial Group, Inc. (MTFG; 株式会社三菱東京フィナンシャル・グループ, Kabushiki kaisha mitsubishi tōkyō finansharu gurūpu) was one of Japan's largest banks ranked by assets (an estimated US$1 trillion), second only to Mizuho Holdings. On October 1, 2005, MTFG completed the acquisition of UFJ Holdings, Japan's fourth largest banking group, to form the Mitsubishi UFJ Financial Group (MUFG), the world's largest bank ranked by assets with ¥190 trillion (approximately $1.7 trillion).