This is a wooden bark craft tea coaster. The slightly rounded square shape highlights the wood bark pattern, creating an elegant and refined atmosphere. This item is from the Showa era. It's from my grandmother's collection, who loved collecting tea sets. She had many tea sets for entertaining guests, and I believe this one was also hardly used, as it was stored in the cupboard in this condition. Please refrain from purchasing if you are overly concerned about minor details. Tea set Tea Sencha (Japanese green tea) Coaster Kaba-zaiku (birch bark craft) Akita Natural wood Japan Crafts Traditional craft Red-brown Dark brown Autumn