If you're looking for manga similar to Samurai 8: The Tale of Hachimaru, you might like these titles.
Centers on a samurai with blue eyes who comes from the West and who exemplifies the creed of bushido.
In an age where samurai hold great respect and immense power, a new king rises to its throne. He orders the greatest blacksmith in the land to use a special rare metal called the Tamahagane to forge the best katana for his elite force of the best samurais. A young girl named Kokuran and her aid Kazuramaru are on their way to the capital to get a glance at the new king. Kokuran has incredibly long hair with a heavy metal ball at the end. It is actually made from Tamahagane, and the katana that the king had made are part of her soul. The more Tamahagane she recovers, the more personality Kokuran is able to regain.
Hotheaded, cocky Yaiba Kurogane is a would-be samurai who’s been trained in the jungle by his father for his entire life; but soon, Yaiba finds himself in Japan and in a whole new world! He quickly meets the Mine family and defeats Onimaru, the head of the high school kendo club, who vows to take his revenge on Yaiba. Later on, Onimaru stumbles across an evil sword and is possessed by the demon sealed within it, making Yaiba’s life even more difficult. Now, Yaiba must wield the powers of Raijin, the thunder sword, to help stand a chance against Onimaru’s newfound evil ways. He will train hard and find new friends and allies in his quest to stop the ultimate evil!