If you're looking for anime similar to Kamunagara Gaiden, you might like these titles.
The time has come for the next Shaman King to be crowned in the great Shaman Fight. Yoh Asakura is one such hopeful, a kind-hearted boy with a hidden power... and a terrible secret. Now, the fate of all mankinds rests in the hands of Yoh and his companions as they must battle the most powerful shaman who ever lived!
Sharaku is a descendant of an ancient race of three eyed humans who once ruled the world in the old days with superior technology and intelligence. Sharaku is very intelligent, but also very evil. If his third eye is covered, he becomes a very likeable, nice, clueless little kid. Wato is the daughter of a local priest and is in love with the evil, powerful side of Sharaku. The evil Sharaku is in love with her and acts as her protector, but when his third eye is covered, Wato has to protect him and act as his mother.
Takeshi and Kentaro are two friends who have been together since they were infants. They were born in the same hospital on the same day, have shared every class in school and even vie over the same girl. However, soon the two friends become closer than they’d like when they discover they are the Chosen Ones that will defeat the powers of an evil being and his minions who are currently wreaking havoc on mankind. Together, the two merge and become a super fighter known as Barom One, capable of taking down monsters with ease. Can Takeshi and Kentaro band together to save the world?