Note: this post splinters off of Marvel Live Action Actors in the 1970s: Where are They Now? It has been split into separate posts to give the shows/TV movies more room to breathe. Info derived from imdb. * = Newly added name from original post.
The Amazing Spider-Man (1977-1979)
Only actors in 6+ episodes and/or from the comics noted:
Nicholas Hammond (Spider-Man): in Gallipoli (4 episodes 2015), Elimination Game (2014).
David White (J. Jonah Jameson/pilot): died in 1990
Robert F. Simon (J. Jonah Jameson/series): died in 1992
Chip Fields (Rita Conway): last known acting role in 2007, as Director in 2012.
Michael Pataki (Capt. Barbera; pilot/season 1): died in 2010.
Ellen Bry (Julie Masters/season 2): in Castle (1 episode 2013).
* Hilly Hicks (Robbie Robertson; one season 1 episode): last known acting role in 1995, as Director in 2004.
* Jeff Donnell (Aunt May Parker; one season 1 episode): died in 1998.
Spider Man (Supaidâman) (1978-1979)
Only actors in 2+ episodes noted.
Shinji Tôdô (Spider-Man): in Uchuu Keiji Shaider Next Generation (2014), Uchuu Keiji Sharivan Next Generation (2014).
Mitsuo Andô (Professor Monster): died in 1997.
Yukie Kagawa (Amazoness): last known acting role in 1990.
Hifofumi Koga (Spider-Man suit actor): no known subsequent acting roles.
Tôru Ôhira (Narrator): in Kingdom Hearts HD 1.5 Remix (2013 video game); last known non-video game role in 2005; as Self: Yûmei jin mo kayou purachina ryokô sha: Osusume! Nippon tetsudô no tabi (2013).
Izumi Oyami (Shinka Yamashiro): no other known acting roles.
Rika Muira (Hitomi Sakuma): last known acting role in 1992.
Yoshiharu Yabuki (Takuji Yamashiro): no other known acting roles.
Rie Rinehart (Rita): no other known acting roles.
Tina Margo (Bella): no other known acting roles.
Noboru Nakaya (Juzo Mamiya): died in 2006.
Wanita Somaborudo (Bella): no other known acting roles.
* Toshiaki Nishizawa (Garia): died in 2012.
* Ryusuke Sakitsu (Spider-Man suit actor): last known acting role in 1995.