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Yoshiaki Koizumi (小泉 歓晃, Koizumi Yoshiaki, born April 29, 1968) is a Japanese video game designer, director, and producer, and business executive. He is a senior executive officer at Nintendo, where he is known for his work within their Mario and The Legend of Zelda series. Since 2013, Koizumi is also part of the board of directors of Nintendo’s subsidiary 1-UP Studio as one of its representative directors, and since October 2022, Koizumi is part of the board of directors of Nintendo's subsidiary Nintendo Pictures as one of its directors.