Ochiai (written: ) is a Japanese surname. Notable people with the surname include:
, Japanese voice actor , Japanese judoka, karateka and writer , Japanese baseball player and manager , Japanese footballer Kentaro Ochiai, Japanese diplomat at Paris Peace Conference (1919–1920) , Japanese film director , Japanese samurai , Japanese actor , pseudonym of Ayukai Morimitsu, Japanese poet Nobuhiko Ochiai (落合 信彦; 1942–2026), Japanese journalist and novelist , Japanese sport shooter , Japanese voice actress , Japanese basketball player , Japanese sumo wrestler competing under the name Hakunofuji , is a Japanese academic and media artist
See also Ochiai, Okayama, a former town in Maniwa District, Okayama Prefecture, Japan Ochiai Station (disambiguation), multiple railway stations in Japan