Thank you for viewing. This is a Bizen-yaki incense container (kogo). The motif is likely a classic butterfly. There is a potter's mark on the back, which seems to be a well-known mark, but I don't know what era it's from. (I think it's not a recent piece...) There appears to be a crack, likely formed during firing. (Please check images 7 and 8.) 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 not clear which ones are, or even if it's true. Please view the images and make your own judgment and take responsibility for whether the item is valuable. There is no original box or artist's card. This item has been stored by a non-professional for a long time. Thank you for your understanding.