The “Kumamoto PA Wiki” has some information about sexual health and AIDS testing in Kumamoto (top URL; lower URL is for recent news article).

http://kumamotopa.pbworks.com/w/page/5003114/Sexual%20Health%20in%20Kumamoto%20(STD-HIV%20Testing)

http://www3.nhk.or.jp/nhkworld/english/news/20140302_25.html