Related Information for Crystal King At least two acts have recorded under the name Crystal King:1) King) are a Japanese rock duo who were first active in the 1970s. They are known in the west for performing "Ai wo Torimodose!", the theme tune to the anime Hokuto no Ken.The band was formed by Musshu Yoshizaki in 1971, who was joined by a second vocalist, Masayuki Tanaka, in 1975. Other musicians to have played with the band include Yamashita Michio on guitar and Nomoto Hideto.. read more