Gegege no Kitarou: Chisougan

A wealthy man named Yasui asks Kitaro for help after the source of his fortune turns against him. Years earlier, he entered a realm of spirits and stole the Geomancer's Eye, a treasure capable of revealing valuable veins hidden beneath the earth.

The eye must now be remade, and a monstrous earthworm demands that Yasui choose between sacrificing his son Yasuo or surrendering his own life and wealth. When the desperate boy is transformed into the new eye, Kitaro enters the creature's strange inner world to undo a punishment born from his father's greed.