It took half a month for the product to arrive because it was ordered. When I finally opened the package, I found that the corners of the top plate (wood) had been bumped. I thought the corners looked suspicious before I opened the cardboard box, but as I suspected, I contacted the support center and was told to wait two weeks for a new product to arrive. In the meantime, please keep the cardboard box that was delivered first. It's impossible to keep a cardboard box of this size for two weeks... I took it to the nearest Nitori store by car and had them take back the defective product. If there is no Nitori store nearby or you don't have a car, it's hell. I think it was a mistake during delivery, but I think it would be better not to put the wooden board, which is the most easily damaged, on the bottom without any protective material. The new product that arrived was triple-layered cardboard, and the inner boards were also individually protected. The amount of rubbish increased considerably, but I'm glad that I received a proper product.