Dark Metro (2008)

Blurb:
What lies below Tokyo’s subway system is more frightening than you could have ever imagined...in its subways there exists a boundary between this world and the next--the land of the dead, and the mysterious young man Seiya is its guide. In this collection of bone-chilling shorts, follow the twisted tales of death and hauntings that inhabit this horrifying underworld, where innocent youth fall victim to the ghosts who inhabit Tokyo’s underground.

Source: www.anisearch.com/manga/94