I found an interesting link amongst my searches:

http://www.geocities.jp/meisaku_asobu/j … owind.html
http://www.geocities.jp/meisaku_asobu/K … owind.html
http://www.geocities.jp/meisaku_asobu/J … ivion.html

My Japanese isn't good enough to understand the website properly, but I thought it may be of use to some other people, too. If anyone wants to help out with getting me (or anyone else) to understand what you have to do that'd be awesome, but I'm not requesting anything as such.