These handmade sushi blocks are awesome. They were created by Tokyo creative design firm Plaplax for a food-themed exhibition in Okazaki. They will be produced in a limited edition of 20 by woodworker Mochizuki Tsutomu. The 48-piece sets reserved by July will be available by early August. But only for shipment within Japan.
There is also a block set of little, simmering Japanese bar snacks called oden, which you also will not be able to buy. Don't collect them all!