Hisaichi Ishii (いしい ひさいち or 石井 壽一, Ishii Hisaichi; born September 2, 1951, in Tamano, Okayama Prefecture, Japan) is a Japanese manga artist. He is best known outside Japan for his manga series Nono-chan, which was adapted into the Studio Ghibli anime film My Neighbors the Yamadas (1999).
Ishii graduated with a degree in sociology from Kansai University. His debut professional work was Baito-kun. His manga covers a wide range of topics including baseball (featured in his debut work), politics, economics, current events, and philosophy. He is known for his extreme caricatures of well-known celebrities and public figures, including Kōichi Tabuchi (a professional baseball catcher in Japan), Kim Jong Il, and Tsuneo Watanabe (executive director of the Yomiuri Shimbun Holdings group).
Notable works include:
- Nono-chan (formerly titled My Neighbors the Yamadas)
- Ganbare!! Tabuchi-kun!!
- Ojamanga Yamada-kun
- Ishii Hisaichi no Taiseikai
- Chiteijin (The Fabled Underground People)
- Baito-kun
- Ninja Mugeichō
- Watashi wa Neko de Aru
