Ok. I'm going to be looking on that auction site just for the うさぎ(usagi; rabbit) shaped covers. I need something that instantly screams "Japanese!" in my collection. Something more Japanese than a Japanese siren with buttons with Japanese characters on them and that has electronic voice tones speaking in Japanese.
She'd murder me outright if she found out that I revealed it to the denizens of eLB, but my nickname for my wife is Usagi (don't anyone dare ask why; it's not what you think it is). I think, no, I know that some of these covers would be a perfect birthday present for her.