Kokuyoton

Kokuyoton, Obsidian Style, is an Advanced Chakra Nature displayed only by Josho Adashino. As he was born sealed into Keibetsu Pyuta, it is unknown if it is the Kekkei Genkai of the Pyuta clan, or the Adashino clan. In fact, it is unknown if there is an Adashino clan outside of Josho.