I believe this product is from the late Showa 50s (1975-1985). Although it is unused, it has been stored in a warehouse for a long time, so it is likely to have deteriorated over time. There are some light stains on the surface. The material is a combination of bamboo and plastic packing straps, woven together to enhance durability compared to products made only of natural materials. The dimensions are approximately 70cm wide, 60cm long, and 12cm deep.