Rurouni Kenshin [Manga]

From Viz:

140 years ago in Kyoto, with the coming of the American “Black Ships,” there arose a warrior who, felling men with his bloodstained blade, gained the name Hitokiri , man slayer! His killer blade helped close the turbulent Bakumatsu era and slashed open the progressive age known as Meiji . Then he vanished, and with the flow of years, became legend.

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