Utsumi (written: 内海) is a Japanese surname. Notable people with the surname include:

  • Chieko Utsumi (born 1903), Japanese physical educator
  • Kenji Utsumi (内海 賢二, 1937–2013), Japanese voice actor
  • Utsumi Tadakatsu (内海 忠勝, 1843–1905), Japanese politician and cabinet minister
  • Takeshi Utsumi, American operations researcher
  • Tomohide Utsumi (内海 知秀, born 1958), Japanese basketball coach
  • Yoshio Utsumi (内海 善雄, born 1942), former secretary general of International Telecommunication Union
  • Hideaki Utsumi (内海 秀明), former Capcom sound designer

Fictional characters

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  • Shō Utsumi (内海 将), a character in the anime series SSSS.Gridman
  • Yukie Utsumi (内海 幸枝), a character in the novel Battle Royale