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