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Surname Koudai (Koudai , コウダイ , Кодаи ) , all around the world, is a common family name. The cognomen Koudai is habitual in Eastern Asia, particularly Japan, where it is quite a common surname. Much less frequently, Koudai is the forename as well as the last name.
Doi, Yamaguchi, Takahashi, Matsumoto, Yamamoto, Nakazawa, Nakagawa, Nakamura, Tachihara, Takamori, Kurihara, Katayama, Sugawara, Motizuki, Matsushita, Morisaki, Kitaguti, Iwahori, Homori, Hatate, Kudaka, Okabe, Ishii, Ayano, Sugii, Monma, Higa, Kuba, Arai, Washida, and Mitsuhashi