In the entire world, Kasugai (Kasugai 
) is an extremely rare unknown gender forename. Much more frequently, Kasugai is the last name as well as the forename.
Mr, Senri, Arisa, Akira, Akiko, Ayako, China, Kazuo, Kachi, Kaoru, Kosan, Kenji, Kunio, Junko, Junya, Jitsu, Takao, Takeo, Torao, Tomio, Teruo, Tetsu, Shoji, Shiro, Sadao, Misao, Ko, To, Ei, Ho, Man, Shu, Kai, Ken, Jun, Nao, Naoki, Shin, Aimi, Koko, Koji, Riji, Jiro, Toru, Ichi, Yuji, Masao, Mineo, Akio, and Norio