This board is from an private home in Hiroshima. It is a 12cm single-piece floor board, and looks basically unused, though some wear from being in storage may exist.
The tightness of the grains is indicative of kaya, katsura, or agathis. The endgrain shows nice even curves with a Kiura cut, which points more towards Matsuju or Katsura. The dark tone and the consistency of that tone throughout the board (no lightening in the lower corners) points towards Katsura.
With a center-cut board like this, the sides have nice parallel lines while the surface and underside feature unique cross-grains.
The sides and bottom of the board show considerable white wax residue, which a good sign that the board is valuable and has been cared for.
Due to its size I would not recommend bundling this with other items, unless you plan to use FedEx shipping.
International Seamail shipping from Japan (to almost everywhere) is already included in the purchase price for free - however, this service takes up to 2-3 months. You may upgrade to FedEx shipping by adding this upgrade to your cart. This also means your items will have more room for padding and spend less time in transit, so they are less likely to be damaged by the shipping. In either case please allow a week for us to prepare your package for Customs, then you will receive a tracking number that you can use to sign up for notifications.
Please understand that this is a vintage item.