Shirô Katô

Ryota Nonomiya is a successful businessman driven by money. He learns that his biological son was switched with another child after birth. He must make a life-changing decision and choose his true son or the boy he raised as his own.

Two Japanese friends accidentally kill their boss and dump his remains in Black Fuji, a mountain/landfill hybrid. This leads to poor results when the chemicals of the landfill mix with the corpse (and many other corpses) to give rise to a zombie infestation in Tokyo.