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Cognomen Isshoku (Isshoku ) , in the entire world, is a common family name. The surname Isshoku is characteristic of Eastern Asia, particularly Japan, where it is quite a common surname.
Ko, Sadao, Shiro, Shuji, Showa, Shoji, Shozo, Seiji, Akira, Bunyu, Kazuo, Kachi, Kaoru, Kenji, Keiji, Kunio, Kikuo, Gishi, Junji, Jitsu, Takao, Takeo, Misao, Mineo, Masuo, Masao, To, Ei, Ho, Yo, Yu, Sho, Kyo, Ryo, Jun, Akio, Tadao, Kozo, Gaku, Jiro, Toru, Eini, Eiyu, Isao, Ichi, Waku, Yoji, Yuji, Koji, and Teruo