The story of Samurai X really begins in the late 1860s during the last days of the Tokugawa era. Here, the main character of the series, Kenshin Himura, makes his mark. As a fourteen year old with a belief that he could use his sword to protect the peasants and the weak who were suffering during the Tokugawa era and against his master's wishes, Kenshin joins the rebels who seek to overthrow the Tokugawa government.
Here, Kenshin becomes an assassin for the rebels. Using his Hiten Mitsurugi Ryuu technique, he ends up killing countless people and as a result, he develops the legendary name "Hitokiri Battousai" or "Battousai: The Slasher". Mysteriously, at the end of the Tokugawa era, Kenshin Himura disappears and begins wondering all over Japan for ten years with the vow in mind never to kill anyone again.