Intrigue in the Bakumatsu: Irohanihoheto is a oNA (web) anime that premiered in fall 2006, produced by Sunrise.

About the production: the story comes from an original script, there are 26 episodes of about 24 minutes and its current status is "finished".

Its main genres are action and drama, with themes such as Male Harem, Historical, Male Protagonist and Found Family.

On AniList, Intrigue in the Bakumatsu: Irohanihoheto has an average score of 65%, a good score, and appears on 6,455 users' lists.

In the final years of the Bakumatsu, wandering mercenary Yojiro Akizuki travels the length and breadth of Japan. And while he employs his sword in the usual fashion, he also uses it to help him locate supernatural items which he pursues with single-minded determination, often with bloody results. In the course of his quest, he crosses paths with a traveling theater group whose members have their own dark agenda. Is it a chance meeting or the result of some, as yet, undiscovered conspiracy? (Source: Sentai Filmworks)

Official synopsis from AniList.