This is a dried block of lumber from Gifu Prefecture. It is Kaya, ready to be turned into anything you can imagine. It would probably have been turned into a table leg for a floor board, but a knot is present in the wood.
Pieces can be taken to repair a Kaya go board, by shaping your own Butterflies/Bowties for arresting cracks, or even replacing a missing knot or a dented corner. This particular piece has a variety of grain and color available so that you can create a perfect repair match.
The dimensions are approximately 36cm long, 11cm x 11cm square. It weighs 2.2kg
FedEx Priority International shipping from Japan is included in the price.