This long list might be taken from mozilla.jp; I have written this actually. Anyway, we may want to use Open Sans for English rather than Lucida Grande etc. How about adding the Japanese font list to [lib.less](https://github.com/mozilla/bedrock/blob/master/media/css/sandstone/lib.less#L29])? Looks like [Chinese people also want to specify their fonts](https://bugzilla.mozilla.org/show_bug.cgi?id=795396), so we could send a separate pull request for that.