Made by traditional artisan Ito Kamedo.
A very high quality copy ink built into the entire Kotsuki set of Oiramiido, and its name is also Zubari "Shoguteki Sumu"
Mineral Oil Smoke.
Natural but uses a lot of substances.
(This is a rare value that uses a substitute for nature.) )
The soot particles are very fine, the ink is elongated, and the black is firmly attached to the paper and has a gloss.