A Shiny Black Substance That Is Used in Pencils
This page is the CodyCross answer for the clue below from Welcome to Japan, Group 577, Puzzle 5 (Cosplay Shops).
Question is: A Shiny Black Substance That Is Used in Pencils
and the answer is: GRAPHITE
Word Meaning:
GRAPHITE — An allotrope of carbon, consisting of planes of carbon atoms arranged in hexagonal arrays with the planes stacked loosely, that is used as a dry lubricant, in "lead" pencils, and as a moderator in some nuclear reactors.
Definitions from Wiktionary.