大阪藝術大學
Hosokawa was born and raised in Fukuoka Prefecture. He launched his acting career as a member of the theater company, Bungakuza, in 1964. He joined Bungakuza after leaving his university. He soon co-starred with actress, Nana Kinomi, in the musical, "Show Girl". Additionally, Hosokawa served as a professor at Osaka University of Arts beginning in 2004.