I've been told that Kenshin, at least partially, is based on a real life assassin. Who was he based on, and what pieces of his story are inspired by this person?
Not having seen the series nor being familiarized with the Gensai's story, I cannot tell you how much of it is based on samurai's story and how much of it is fiction.
1: *Watsuki, Nobuhiro (2003). "The Secret Life of Characters (1) Himura Kenshin". Rurouni Kenshin, Volume 1. Viz Media. p. 56. ISBN 1-59116-220-3.