Well, I just like both CSS and peace so .... :-)

Two notes:

1) I think you made two typos at http://english.globalpeace.jp/store/, the first and last logo link miss the closing ">"

2) Just in case someone's not happy with the links being empty and the logo images only sitting in the background, I would like say that that's very easy to change of course. Just insert the <img> tags into the links and add the following to the CSS:
Code:
.peace-logo img {
display: none;
}
(the images need to be hidden, or else they will sit in front of the backgrounds, and thus hover effect won't work anymore of course)

This way the logo(s) will stay visible even if CSS is disabled.