Though not specific to Kumamoto, I suspect that the “blood type” issue is of interest to many non-Japanese people who live here. This is a podcast that you can download and listen to at your leisure.

“In Japan people believe that your blood type - or ketsueki-gata - defines your temperament and personality. What implications does this have for life, work and love?”

http://www.bbc.co.uk/podcasts/series/docarchive