Thank you for viewing. This is a Bizen-yaki sake bottle (choshi). My father, who was born and raised in Bizen City, obtained this from acquaintances, friends, and artists. He said that his collection included some very old pieces and works by famous artists, but now it's impossible to tell which ones are, or even if it's true. Please examine the images and make your own judgment and take responsibility for whether the item is valuable. A potter's mark is visible, but the artist's name is unknown. There is no accompanying box or artist's card. This item has been stored by a non-professional for a long time. Thank you for your understanding.