Ichii (written: 市井) is a Japanese surname. Notable people with the surname include:

  • Mai Ichii (市井 舞, born 1980), Japanese professional wrestler, mixed martial artist and kickboxer
  • Sayaka Ichii (市井 紗耶香, born 1983), Japanese singer and idol
  • Yuri Ichii (市井 由理, born 1972), Japanese rapper, singer and idol

Fictional characters

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  • Tōru Ichii (一井 透), a character in the manga series A Channel
  • Yui Ichii (櫟井 唯), a character in the manga series Yuyushiki