This is a beautiful Tokoname Bonsai Pot. A circular container is known as a maru. Maru pots can have any depth and may be vase-like.
Outside Dimensions: 5" x 1 1/4"
Inside Dimensions: 4 1/2" x 1"
Stamped by Kiln: No
Drainage Holes: 1
Anchor Holes: 5
Model Number: 05y42