Sekiguchi (written: 関口) is a Japanese surname. Notable people with the surname include:

• Fusao Sekiguchi Japanese industrialist
• Gen Sekiguchi Japanese film director
• Hisao Sekiguchi Japanese footballer
• Isamu Sekiguchi (関口 勇, born 1910), Japanese skier
• Kazuyuki Sekiguchi Japanese musician
• Kunimitsu Sekiguchi Japanese footballer
• Mai Sekiguchi Japanese actress
• Masakazu Sekiguchi Japanese politician
• Taro Sekiguchi Japanese motorcycle racer
• Yuhi Sekiguchi Japanese race driver
• The Sekiguchi Corporation invented the Monchhichi doll.

This page lists people with the surname Sekiguchi.
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