The River of Light

Alternate names

Koumyaku, Light Vein, Mushi Light Pulse

First appearance

The Green Seat (Episode 1)

"Don't stare at it. The glow is deadly to the eyes..." - Ginko

The River of Light (also known as Koumyaku) is a stream of glittering, embryonic mushi called Kouki, flowing beneath the surface of the earth and traversing the entire world.


It is something visible only to those who are aware of the mushi world and are able to close their "second eyelid".


The Kouki

The weaker a mushi gets, the brighter light it emits; because when a mushi is weak it is close to its source, the Kouki - which is the basis of all mushi. The River of Light flows through the Kouki.

The Nazaru seed was created when a Mushi Master sealed the Light Vein in it. It can be used for immortality and resuscitation

In areas where the River of Light flows the strongest, mushi tend to gather, attracted to the pure life energy it emits. At such places there is always a God in control of that place.