The Rurouni Kenshin anime, based on Nobuhiro's manga, has taken the name Samurai X in the Philippines and some other countries.
Nobuhiro is the sign of the (Metal) Dog.
Yahiko Myogin, another character from Nobuhiro's manga Rurouni Kenshin, is actually partially based on himself. Nobuhiro used his outlook on kendo and came up wth Yahiko.
Nobuhiro based many of his characters in his hit manga Rurouni Kenshin on real people.
In addition to basing Hajime Saitô on his real life counterpart, Nobuhiro also used another man from the Shinsengumi, Sanosuke Harada. Harada became the model for Sanosuke Sagara, a character from his manga Rurouni Kenshin.
Hajime Saitô from his hit manga Rurouni Kenshin was also based on his real life counterpart. In addition, the Shinsengumi were a real group during the Bakumatsu. They were against the Meiji government.
Kenshin Himura from his hit manga Rurouni Kenshin was based on Kawakami Gensai. Gensai was one of the top four assassins during the Bakumatsu - Japanese revolution.
Nobuhiro played "kendo" in middle school.
Watsuki's favorite villain from his hit manga, Rurouni Kenshin, is Makoto Shishio.
His favorite character from his hit manga, Rurouni Kenshin is Yahiko Myojin, because of his determination to become strong.
Watsuki is a big fan of the Shinsengumi, a special police force of the late shogunate period in Japanese history.
He likes action movies, such as "Die Hard", "Midnight Runner" and "Back to the Future".
He was inspired by and enjoys many American comics such as "Spiderman" and "X-Men".
Some of his favorite anime are Neon Genesis Evangelion and Kodomo no Omocha (A.K.A. Kodocha).
Watsuki enjoys playing video games, especially Vampire Hunter and Samurai Showdown.