What actors and actresses appeared in UFO senshi Diapolon - 1976?

There seems to be a misunderstanding. "UFO senshi Diapolon" is a Japanese anime television series that aired in 1976. Anime is animated, so there are no actors or actresses involved in its production. The voices for the characters are provided by voice actors, sometimes called "seiyu."

To answer your question more accurately, here are some of the prominent voice actors who contributed to the "UFO senshi Diapolon" series:

* Kenji Utsumi as Diapolon/Taro Mishima

* Toshiko Fujita as Kiku Mishima

* Issei Furuya as Jun Mishima

* Kazuko Sugiyama as Yumi Shibata

* Hidekatsu Shibata as Dr. Shibata

If you'd like to learn more about the voice actors involved in the "UFO senshi Diapolon" anime, you can consult Japanese anime databases or Wikipedia.