Side quest = Charcoal

[Xero]

So with a side quest I have, something about making fresh breath or whatever, one of the requirements is 2 pieces of charcoal. Anyone know what youkai drops charcoal?

[Minato]

Akamekabe and Dainurikabe
Variations of Nurikabe.

You won't see them until past Mount Kurama in Kyoto

Charcoal sometimes pops up in Miroku's bargains..

Also.. try using this, a lot of people have already asked about this