After 19 years, Hiroaki Samura will end his historical manga Blade of the Immortal (Mugen no Jūnin) in the February 2013 issue of Kodansha's Monthly Afternoon magazine on December 25. The manga launched in the same magazine in December of 1993, and its first 29 volumes have 5 million copies in circulation. The magazine's November issue published the 216th chapter on Tuesday and revealed that the manga will end in the 219th.

Dark Horse Comics published the 25th volume of the manga in North America in August. The manga inspired a television anime in 2008, and Media Blasters released it in English.

Source: Mainichi Shimbun's Mantan Web

Update: More information added.