Mudras. Yoga benefits for the body and mind
Mudra tattoo design by genotas.deviantart.com on @DeviantArt
Buddha hand holding a lotus set
Jaime Jones ✤ || CHARACTER DESIGN https://www.facebook.com/CharacterDesignReferences
Some conceptual ideas for Wildemoore Manor, home of the wizard, Ansanom, and his apprentice, Serena.
I did manage to find a few example of Hanya masks at the shrines on the Kunisaki Peninsular in Kyushu. Male demons were far more common though.
Japanese Mask - Hanya mask