Igarashi (五十嵐?, "fifty storms") is a Japanese surname. Notable people with the surname include:
- Daisuke Igarashi, manga artist
- Fumio Igarashi, figure skater
- Hitoshi Igarashi, translator
- Kazuo Igarashi, aikido teacher
- Koji Igarashi, video game producer and director
- Mitsuru Igarashi, keyboarder and songwriter
- Rei Igarashi, actress and voice actress
- Ryota Igarashi, a relief pitcher
- Satsuki Igarashi, member of Clamp
- Shunji Igarashi, actor
- Takuya Igarashi, anime director
- Toshiyuki Igarashi, light flyweight boxer
- Yumiko Igarashi, manga artist and artist
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