Takehisa Yamaguchi (山口 豪久 Yamaguchi Takehisa), born as Tomoyuki Yamaguchi (山口 智之 Yamaguchi Tomoyuki) (January 25 1945 - April 6 1986), played Joji Yuki/Riderman in Kamen Rider V3, Riderman being the partner of Kamen Rider V3. He also acted as suit actor for Riderman. He was credited as Satoru Yamaguchi (山口 暁 Yamaguchi Satoru). He was also known as Akira Yamaguchi (山口 あきら Yamaguchi Akira). He later reprised his role in the Kamen Rider X movie, Five Riders vs. King Dark, and in the last few episodes of Kamen Rider Stronger.