The link is http://hub.moodlejapan.org/ and the course is "mostly talking activities" but there are a number of other good courses on there that show Moodle off well.
BUT *heavy sigh* the reason I did not share the link, and that I just gave a heavy sigh, is that they have been moving servers and still have not got the DNS sorted out for that yet. So we can't access it.
I will ping them again and see if I can get a resolution.