Ōishi (surname)

Ōishi, Oishi or Ooishi is a Japanese surname. Notable people with the surname include:


 * Daijiro Oishi (大石 大二郎), Japanese baseball player
 * Hisako Ōishi (大石 尚子), Japanese politician of the Democratic Party of Japan
 * Makoto Oishi (大石 真翔), Japanese professional wrestler
 * Masamitsu Oishi (大石 正光), Japanese politician of the Democratic Party of Japan
 * Nobuyuki Oishi (大石 信幸), former Japanese football player
 * Ryuhei Oishi (大石 竜平), Japanese footballer
 * Sadahisa Ōishi (大石 定久), retainer of the Ogigayatsu-Uesugi branch of the Uesugi, and the builder of Takiyama Castle
 * Tadashi Ōishi (大石 直嗣), Japanese shogi player
 * Takaya Oishi (大石 尚哉), former Japanese football player
 * Tamotsu Oishi (大石 保), career officer in the Imperial Japanese Navy during World War II
 * Tsugutoshi Oishi (大石 治寿), Japanese footballer
 * Yasuko Oishi (大石 康子), Japanese swimmer
 * Yoshino Ōishi (大石 芳野), Japanese photographer
 * Yoshio Ōishi (大石 良雄), the chamberlain of the Akō han in Harima Province, Japan (1679–1701), known as the leader of the forty-seven rōnin

Fictional characters

 * Hisako Ōishi, a Japanese schoolteacher in the 1952 novel Twenty-Four Eyes and the 1954 film adaptation of the same name