Brave 10

"Brave 10" is a manga series written by Kairi Shimotsuki. It originally ran in Media Factory's Comic Flapper from 2007 to 2010. The series resumed on June 15, 2011, under the title "Brave 10 Spiral" (often called "Brave 10 S") and was serialized in Monthly Comic Gene. An anime adaptation by Studio Sakimakura and TMS Entertainment started airing on January 8, 2012. The original manga is licensed by Tokyopop, but no volumes had been released by 2012. The story is inspired by the historical Sanada Ten Braves, a group of ninja who served the warlord Sanada Yukimura during Japan's Sengoku period. The anime was available for streaming on Crunchyroll.