Ōishi (surname)

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

• Daijiro Oishi (大石 大二郎, born 1958), Japanese baseball player
• Hisako Ōishi (大石 尚子, born 1936), Japanese politician of the Democratic Party of Japan
• Makoto Oishi (大石 真翔, born 1979), Japanese professional wrestler
• Masamitsu Oishi (大石 正光, born 1945), Japanese politician of the Democratic Party of Japan
• Nobuyuki Oishi (大石 信幸, born 1939), former Japanese football player
• Ryuhei Oishi (大石 竜平, born 1997), Japanese footballer
• Sadahisa Ōishi (大石 定久, fl. 1545), retainer of the Ogigayatsu-Uesugi branch of the Uesugi, and the builder of Takiyama Castle
• Tadashi Ōishi (大石 直嗣, born 1989), Japanese shogi player
• Takaya Oishi (大石 尚哉, born 1972), former Japanese football player
• Tamotsu Oishi (大石 保, 1900–1946), career officer in the Imperial Japanese Navy during World War II
• Tsugutoshi Oishi (大石 治寿, born 1990), Japanese footballer
• Yasuko Oishi (大石 康子, born 1931), Japanese swimmer
• Yoshino Ōishi (大石 芳野, born 1944), Japanese photographer
• Yoshio Ōishi (大石 良雄, 1659–1703), 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