Kurogane no Valhallian  

Valhallian the Black Iron, 黒鉄のヴァルハリアン, 흑철의 발할리안

Tetsujirou Souma, a survivor of the Mongolian invasion who hails from Kamakura, found himself in an unknown location upon waking up. Hirst, the girl responsible for his arrival, informed him that they were in Valhalla, a realm where fallen warriors gather after death. To regain life, Tetsujirou must now battle against "dead warriors" from various epochs in this violent land of carnage. This marks the beginning of a samurai tale centered on combat and vanquishing foes, even if it means taking their lives.