Koga (written: ), Kōga, Kouga or Kohga is a Japanese surname. Notable people with the surname include:
, Japanese badminton player , Japanese voice actress , Japanese former rugby union player , Japanese painter active in the Taishō period Hide Koga, nickname of , Japanese baseball player , Yukio Mishima's kaishakunin , often written as Issac Koga, Japanese inventor and scientist , Japanese politician from Democratic Party of Japan , Japanese swimmer , Japanese former footballer , Japanese volleyball player , Japanese Liberal Democratic Party politician , Japanese swimmer Mary Koga (1920–2001), Japanese-American photographer and social worker in Chicago , Japanese former footballer , Japanese composer, guitarist and pop musician , former Japanese football player , Japanese shakuhachi player in USA is the former stage name of , Japanese bass player , fleet admiral during World War II , Japanese badminton player , actor in martial arts films , Japanese unionist , Japanese volleyball player , Japanese footballer , Japanese footballer , Japanese footballer , pilot of the Akutan Zero in World War II , Japanese volleyball player , Japanese football player , Japanese football player , retired Japanese judoka , Japanese former footballer , Japanese stock car racing driver , a Japanese mixed martial artist , a judo world champion , Japanese boxer Victor Koga (1935–2018), Japanese-Russian martial artist Yukiko Koga (born 1969), anthropologist , Japanese manga artist , Japanese shogi player