The history of Rurouni Kenshin
Kenshin existed twice before the series did. Two pilot stories under the title Rurouni: Meiji Swordsman Romantic Story ran in Jump specials in December 1992 and April 1993; Watsuki called the second a side story and put, in his words, all his soul into its 31 pages. The full series began in Weekly Shōnen Jump on April 12, 1994, and ran to September 21, 1999: 255 chapters, which Watsuki calls Acts.
The ending was a decision, not a cancellation. Watsuki had planned a short run at first, then let the cast and the Kyoto arc grow with the reader surveys. When the Jinchū arc closed the story’s questions, he stopped, with his editor Hisashi Sasaki backing the call: end at the peak, respect the readers and the author’s limits. Volume 28 followed on November 4, 1999.