I have no knowledge of pottery, but my parents told me it was Bizen ware. It came out from the back during a shelf cleaning. I think it's from 30 to 40 years ago. Size: Approximately 24.5cm wide Shelf: Approximately 9cm A handmade ceramic bowl with a beautiful brown and gray gradation. - Color: Brown and gray gradation - Shape: Irregular shape - Material: Pottery - Features: Handmade texture - Uses: Tableware, decoration Thank you for looking.