|This article is about a/an actor in Kamen Rider V3.|
|Takehisa Yamaguchi as Joji Yuki in Kamen Rider V3.|
|Born||January 25 1945|
|Born in||Kanagawa Prefecture, Japan|
|Kamen Rider V3|
|Takehisa Yamaguchi as Joji Yuki in Birth of the 10th! Kamen Riders All Together!!, his last appearance in the role before his death|
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?).
Takehisa Yamaguchi only returned in one episode of Kamen Rider (Skyrider). In the other 4 episodes where Riderman appeared, he was portrayed by suit actor Junichi Iwai (岩井 潤一 Iwai Jun'ichi?) alongside assorted voice actors.
In 1984, he reprised his role alongside Hiroshi Miyauchi (Kamen Rider V3) and Shunsuke Takasugi (Kamen Rider Super-1) in Birth of the 10th! Kamen Riders All Together!! (1984), which introduced Kamen Rider ZX.
Sadly, Takehisa Yamaguchi passed away on April 6 1986, at the age of 41. He was the first actor who played a Kamen Rider to die. After his death, Riderman would be portrayed by several voice actors and suit actors in his later appearances.