Super Sentai Cast Members Who Also Appeared in Kamen Rider
Here's a list of Super Sentai cast members who appeared in Kamen Rider, before or after. Here are some I can remember:
The legendary Hiroshi Miyauchi was Kamen Rider V3... perhaps his best known role.
Hirohisa Nakata played the final villain Emperor Zero before he became Mason in Bioman. Both performances were extremely evil.
Yutaka Hirose appeared as a guest in Kamen Rider Black episode 4. He wanted to be Kamen Rider Black as some people say but the role went to Tetsuo Kurata instead. He later appeared in Kamen Rider Agito episodes 49-50 before he quit Tokusatsu not liking how it has become. How I wish he appeared in Boukenger as Gaja.
Ryosuke Sakamoto appeared in Kamen Rider Black episode seven as a man whose parents was killed by ruffians, that was after he was Red One in Bioman. He'll be back for the Gokaiger movie. Woohoo!
In Kamen Rider Black episode 8, Miyuki Nagato appeared as a Gorgom henchwoman helping out the scheme of the "Devil's Trill". She was previously Ulk in Flashman.
Joji Nakata after his appearance as Kaura and before becoming Dr. Bias, guest starred in Kamen Rider Black episode 10 as a doctor who was misguided by Gorgom, left and lived to tell the tale.
Kouji Unoki who acted as Dyna Blue became the human form of the Buffalo Monster.
Hiroki Nishimoto appeared in Kamen Rider Black episode 29 as a friend of Kasumi. Before that, she was Sayaka Nagisa/Change Mermaid.
Mayumi Yoshida who was Lou/Pink Flash appeared in Kamen Rider Black episode 37 as a wedding guest.
Masashi Ishibashi appeared in Kamen Rider Black episode 40 as a man who teaches martial arts.
Prior to Turboranger, Kenta Satou appeared as Kotaro's childhood friend named Yuusuke in Kamen Rider Black RX episode 8 who discovered Crisis Empire's latest weapon.
The legendary Kenji Ohba (Gavan, Battle Kenya, Denzi Blue) appeared in Kamen Rider Black RX episode 34 who was looking for his missing son.
In Kamen Rider Double episode 21-22, Ayumi Kinoshita was Aya Kutou the human form of Triceratops Dophant. She like Kouji Unoki was playing both a Sentai ranger and Kamen Rider monster.
Missed any? Let me know!