Kyoushirou Kamui is an older, wandering samurai who took in little Kyouichi Houraiji after his father was killed. Kyoushirou became Kyouichi&#039;s kenjutsu shishou (swordsmanship master) and struggled to instill in the brash boy a sense of self and true justice; he could tell Kyouichi was running away from his feelings over his father&#039;s death, and it turned him into a self-righteous bully, much to Kyoushirou&#039;s disappointment.    A mysterious man, Kyoushirou eventually disappears from Kyouichi&#039;s life during middle school, once more taking to the unknown road for no apparent reason. He leaves him in the care of the drag queens at Club Diva, where Kyouichi takes Kyoushirou&#039;s place as their &quot;samurai-for-hire&quot;.    Although not much is known about the wizened samurai from the omake (extra) episode in the anime, Kyoushirou was a key player and comrade-in-arms to Genma Hiyuu (Tatsuma Hiyuu&#039;s biological father) with a gaiden (side-story) in the original videogames &quot;Tokyo Majin Gakuen Kenpucho&quot; and &quot;Tokyo Majin Gakuen Oboro-Kitan&quot;.   

The second season of Tokyo Majin Gakuen Kenpucho.
 
The battle against Tendou Kodzunu is over, and the Magami Five begin to look forward to their senior graduation, hopefully planning for their adult futures. However, life in Tokyo is not at peace... 
The underground assassin group known as the Twelve Heavenly Generals of the Martial Fist begin to move against those protecting the city from demons. Normally rumored to kill criminals that the mundane law was unable to bring to justice, the Martial Fist now set their sights on Tatsuma Hiyuu, Kyouichi Houraiji, Aoi Misato, Komaki Sakurai, Yuuya Daigo, and Hisui Kisaragi. 
What is the purpose of this cruel turn of events? And who ordered the hit? New threats emerge as others awakened to powers unleashed by the Ryumyaku seek out the Magami kids - and old friends now return as enemies. 
Destinies will collide as the Stars of Fate begin to merge; Yin and Yang will meet. And soon the shadowy figure pulling the strings will reveal himself, in an effort to raze Tokyo to the ground and awaken the Vessel of the Golden Dragon.

Masaki Kawanabe was such great friends with fellow "Tokyo Majin Gakuen" seiyuu Takayuki Ishiguro (original VA of Yuuya Daigo) they shared an apartment together. Kawanabe said of Ishiguro: "He's such a master cook, I was never left hungry."    

Some of Kawanabe's comic artwork was published in bulletins for the "Tokyo Majin Gakuen" FC.    

Kawanabe is also a screen and stage actor. He's performed in various theatre productions, and has appeared in several TV commercials. He was in the TV drama "Sayonara, Ozu-sensei", and was cast in the live-action movie for "GTO" (as Saitou).