Intrigue in the Bakumatsu: Irohanihoheto

Intrigue in the Bakumatsu: Irohanihoheto (幕末機関説 いろはにほへと, Bakumatsu Kikansetsu Irohanihoheto) is a Japanese original net animation (ONA) series created by Ryōsuke Takahashi and produced by Sunrise. It aired on the Japanese internet streaming channel GyaO from October 6, 2006, to April 6, 2007. The series is set in the final years of the Bakumatsu era, as the Shogunate's power wanes and war looms. Yojiro Akizuki, a mysterious wandering mercenary, wields the legendary Moon Tear Sword, which guides him towards supernatural phenomena. His quest leads him to a traveling theater troupe seeking revenge for their leader's parents' murder. A mysterious playwright within the group appears to be subtly shaping historical events. Yojiro joins them, offering his sword skills while a larger conspiracy unfolds. The series is licensed in North America by Sentai Filmworks.