Ochiai (written: ) is a Japanese surname. Notable people with the surname include: * Kentaro Ochiai, Japanese diplomat at Paris Peace Conference (1919–1920) *, Japanese voice actor *, Japanese judoka, karateka and writer *, Japanese baseball player and manager *, Japanese footballer *, Japanese film director *, Japanese samurai *, Japanese actor *, pseudonym of Ayukai Morimitsu, Japanese poet *, Japanese sport shooter *, Japanese voice actress *, Japanese basketball player *, Japanese sumo wrestler competing under the name Hakuōhō *, is a Japanese academic and media artist

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