Resona Holdings, Inc. is the holding company of Resona Group, the fifth-largest banking group in Japan as of 2012. It is headquartered in the Kiba area of Koto, Tokyo. The main operating entities of the group are Resona Bank, a nationwide corporate and retail bank headquartered in Osaka, and Saitama Resona Bank, a smaller bank headquartered in Saitama City which primarily serves Saitama Prefecture, and are thus considered to be "city banks" of Japan. Most of these banks' operations are descended from Daiwa Bank and Asahi Bank, which merged in 2003. Wikipedia