Seiji Sakaguchi
The ring name at the time of debut was Mitsuo Yoshida (吉田 光雄), but from April 1977 after returning from overseas training, he adopted his famously known ring name "Riki Choshu" after Choshu (長州) in honor of the Choshu Forces, another name for his hometown Nagato. In the 4th World League match, which he participated in when he returned to Japan, he finished third with Nikolai Volkoff, behind winner Seiji Sakaguchi and runner-up The Masked Superstar.