Hmmm. It seems that the author of this article was sent to Kumamoto from Tokyo by RocketNews just to look into this. I can think of more important topics to investigate but, since the article has been published, here you go:

http://en.rocketnews24.com/2013/04/06/alcohol-made-with-fermented-wasps-gives-new-meaning-to-the-phrase-get-your-buzz-on/