Yokoi is Japanese surname. Notable people with the surname include:
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Gunpei Yokoi, designer of the Game Boy and other Nintendo products
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Hirotaka Yokoi, professional mixed martial arts fighter
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Shoichi Yokoi, soldier and celebrity
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Shonan Yokoi, political reformer
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Mitsuo Yokoi, a Japanese voice actor (known as "Tesshō Genda")
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Yokoi Yayū, 18th-century poet
{{surname, Yokoi
Japanese-language surnames