If I was going to buy a few of these I would look at purchasing them through a deputy auction site such as Noppin and have them delivered to my hotel in Japan.

Without taking too much time to look (and without knowing what exactly these boxes are called in Japanese) this is an example of what I had in mind:
http://page19.auctions.yahoo.co.jp/j...%3bbaobab_0303

If you keep searching you are bound to find auctions offering boxes in an assortment of sizes.

I have a selection at home, but that it because they came with the items they were built to store - sometimes it can be cheaper to buy an item on auction with its own box than to buy the actual box.