Bizen ware sake cup. Comes with a box. No instructions. Has a potter's mark.

※ Immediate purchase is welcome.
※ Box included.
※ Instruction manual not included.

This item was found while cleaning out a storage shed. I have no knowledge of this item, so I kindly ask that those who are knowledgeable purchase it!
Due to its age, there are signs of deterioration.
It is unclear whether these are scratches or part of the unique design, but there are some marks that look like scratches in various places.
⚠ Although it was in the box shown in the image, I cannot confirm if the box and its contents are actually the same, so please be aware of this.
The images show everything, so please check them carefully before considering your purchase.
Those who seek perfection or are sensitive, please refrain from purchasing.
Shipping will be via Mercari delivery, wrapped in bubble wrap and protected from moisture. I strive for pleasant transactions, so thank you for your understanding.