11/19, Official Kamen Rider Kabuto Blog.
Tak Sakaguchi Joins the War!

Two shots with Tsurugi for some reason.
From episode 41, the person to play the strongest and most mysterious boss, Nogi Reiji, is Tak Sakaguchi. As he has proved with roles in such films as Versus and Azumi, he is an actor who can really move.

VS Tendô! Mr. Mizushima excels at kicking because he's from a soccer town.

An action lecture with Gatack (Mr. Itô).

In ep 42, too, action and more action!
…there’s a whole hand to hand fighting family there too (!) Beginning with Sakaguchi:
Tadokoro:
Mr. Yamaguchi Yoshiyuki (originally JAC)
Kickhopper:
Mr. Tokuyama Hidenori (boxing)
Ketaros (from the film):
Mr. Kôga Mitsuki (originally a professional boxer)
Caucasus (from the film):
Mr. Musashi (discovered as a K-1 fighter)
Somehow, it seems that all these members have made distinctly awesome action films!
Link.
Notes:
Some of this may be confusing if you haven’t followed the Kamen Rider Kabuto series and film. There are a number of good English-language resources if you want to learn more, including the omnipresent Wikipedia and DramaWiki, run by d-addicts. Basically, the end of the article is noting that a lot of the non-suit actors (for the series and film) are also strong physical fighters.