Since I had it delivered directly to my desk at work, I had some questions regarding this strange package from Japan! Everybody seemed pretty let down when I told them that it was just a book. But who cares! I'm thrilled!
This is the Alfred Birnbaum translation, published by Kodansha English Library. You can find Birnbaum's translation of Pinball, 1973 here [PDF]. Incidentally, Pinball is being republished as well. Probably the best place to get it is eBay.
So here's Hear the Wind Sing next to my copy of A Wild Sheep Chase just to illustrate the size difference. Sheep Chase looks like a hard-cover next to the little Japanese book.
It turns out that there's a dust cover on the book! I wasn't expecting that.
Translation notes at the end of the book
Spine shot. This is definitely going to stick out on my bookshelf.