This is a wooden carved tray (small item holder) with Ainu patterns. My grandparents bought it on a trip. It features powerful carvings and beautiful wood grain, and it also looks great as interior decoration or an accessory tray. Also, the black parts in the fourth image are not stains or blemishes, but part of the wood grain. The detailed production date and artist's name are unknown, but it has a unique texture that can only be achieved through hand carving. I will sell it to someone who understands used items and crafts.