Unfortunately, I do not have access to specific casting information for Japanese TV specials, including this one.
To find the actors and actresses who appeared in the special, I would suggest the following:
* Searching online Japanese databases: Websites like Japanese Movie Database (JMDb) or the Japanese Wikipedia page for the show may have the cast list.
* Checking Japanese fandom communities: Online communities dedicated to "Gokkun" or "Toraiaru" might have fan-made information about the cast.
* Using Google search: You can try searching for "Gokkun Toraiaru Special 2008 cast" in Japanese.
I hope this helps!