Oikawa is a Japanese surname. Notable people with the surname include:Ataru Oikawa , Japanese film director Azusa Oikawa , Japanese fencer Fumihiro Oikawa , Japanese figure skater and journalist Koshirō Oikawa , Imperial Japanese Navy admiral Nao Oikawa , Japanese actress, television personality and AV idol Okuro Oikawa , Japanese astronomer Seijin Oikawa , Japanese motorcycle racer Shihori Oikawa , Japanese field hockey player Takuma Oikawa , Japanese shogi player Oikawa Teruhisa , Japanese sumo wrestler Yūya Oikawa , Japanese speed skater Tōru Oikawa , Japanese volleyball player
