The Loop (TV)
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|This article is about a/an character in Kamen Rider Ex-Aid.|
Seiichi Kuboyama (窪山 誠一 Kuboyama Seiichi) is the boyfriend of Yoko Horiuchi.
Behind the scenes
Seiichi Kuboyama is portrayed by Daiki Tsuji (辻 大樹 Tsuji Daiki).
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