Oikawa (written: ) is a Japanese surname. Notable people with the surname include:
, Japanese film director , Japanese fencer , Japanese figure skater and journalist , Imperial Japanese Navy admiral , Japanese musician, singer-songwriter, composer, actor Mona Oikawa (born 1955), Canadian writer and professor , Japanese actress, television personality and AV idol , Japanese lyricist , Japanese astronomer , Japanese motorcycle racer , Japanese field hockey player , Japanese shogi player , Japanese sumo wrestler , Japanese speed skater
Fictional characters , a character in the manga series Moyasimon: Tales of Agriculture , a character in the anime film Fireworks , a character in the manga series Haikyu!! , a character in the manga series Nurarihyon no Mago , a character in the anime series Digimon Adventure
See also Zacco platypus (オイカワ、追河) 2667 Oikawa, outer main-belt asteroid Oikawa Station, a railway station in Yugawa, Kawanuma District, Fukushima Prefecture, Japan