Kazuto Seki (関 一人, Seki Kazuto, born September 11, 1975 in Shizuoka) is a sailing competitor from Japan. He won a bronze medal at the 2004 Athens Olympics with Kenjiro Todoroki in the 470 (dinghy) class.

Olympic medal record
Men's Sailing
Bronze medal – third place 2004 Athens Men's 470 class
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