Four warships of Japan have been named Mogami, after the Mogami River in the Tohoku region of Honshū:
, a high speed cruiser that commissioned in 1908 and was scrapped in 1928. , a heavy cruiser that commissioned in 1935 and scuttled in 1944 after the Battle of the Surigao Strait. , an launched in 1961 and stricken in 1991. , a launched in 2021.