Ishii
For the town in Tokushima, see Ishii, Tokushima.
Ishii (石井, "stone well") is a Japanese surname. Notable people with the surname include:
- David Ishii (born 1955), Japanese-American golfer
- Hiroshi Ishii (computer scientist), professor at the Massachusetts Institute of Technology
- Hiroshi Ishii (golfer) (born 1941), Japanese golfer
- Kan Ishii (born 1921), Japanese composer, and the brother of composer Maki Ishii
- Katsuhito Ishii (born 1966), Japanese film director
- Kazuhisa Ishii (born 1973), Japanese baseball player
- Kazuyoshi Ishii (born 1953), Japanese master of Seidokan Karate and the founder of the K-1 fighting circuit
- Ken Ishii, techno DJ and producer from Tokyo
- Kikujiro Ishii (1866–1945), Japanese diplomat who negotiated the Lansing-Ishii Agreement
- Koichi Ishii, video game director for the Square Enix corporation. He is credited for creating the Mana series
- Kouji Ishii (born 1960), Japanese voice actor (real name Kōzō Ishii)
- Kunio Ishii (born 1941), professional Go player
- Maki Ishii (1936–2003), Japanese composer, and the brother of composer Kan Ishii
- Mario Alberto Ishii (born 1951), Argentine politician of Japanese origin. Currently mayor of José C. Paz County in the Buenos Aires province of Argentina
- Satoshi Ishii (born 1986), Japanese judoka and mixed martial arts fighter
- Satsuki Ishii, vocalist of Japanese rock group, Hakka
- Shigemi Ishii (born 1951), Japanese footballer
- Shiro Ishii (1892–1959), military physician who created and ran Japan's biological warfare program
- Sogo Ishii (born 1957), Japanese film director
- Susumu Ishii (1924–1991), second kaicho (Godfather) of the Inagawa-kai yakuza gang in Japan
- Takashi Ishii (born 1946), Japanese film director and screenwriter
- Takuro Ishii (born 1970), professional baseball player, and husband of former J-Pop singer Azusa Senou
- Tatsuya Ishii (born 1959), Japanese singer, songwriter, artist, and industrial designer
- Teruo Ishii (1924–2005), Japanese film director
- Tomiko Ishii (born 1935), Japanese actress
- Vania Ishii (born 1973), Japanese-Brazilian judoka
- Yasushi Ishii (born 1970), Japanese singer and composer
Fictional characters
- O-Ren Ishii, character from the Quentin Tarantino film, Kill Bill