Michitoshi's second son, Toshitake IWAMURA, served as vice admiral and Michitoshi's fifth son, Michiyo IWAMURA, became Homu daijin (Minister of Justice), and later was arrested as a class-A war criminal.
次男岩村俊武は海軍中将に、五男岩村通世は司法大臣となった後、A級戦犯として逮捕された。