Family name Sandai (Sandai 
) , globally, is a common last name. The last name Sandai is characteristic of Japan, where it is quite a common surname, Malaysia, where it is a rare surname, and Indonesia, where it is a very rare surname. Much less frequently, Sandai is the forename as well as the last name.
Mr, Showa, Shoji, Seido, Akira, Kazuo, Komyo, Kenji, Kikuo, Jitsu, Shuji, Takao, Tadao, Terin, Teruo, Norio, Nobuo, Hideo, Hisao, Fusao, Isamu, Takeo, Osamu, Sadao, Masuo, Ei, Man, Sho, Ryo, Elo, Epa, Iwa, Anni, Akio, Misao, Koji, Goro, Jiro, Jika, Ikuo, Yoji, Yoyo, Yuji, Maria, Masao, Puan, and Yasuo