Fortunately, as far as I know, there are no longer any 女人禁制 (nyonin kinsei – no women allowed) sites in Kumamoto. Previously, however, there was such a cave

http://www.pref.kumamoto.jp/site/arinomama/fujin.html

and the paper craft for which Yamaga is famous once banned female participation:

http://www.yamaga-kankoh.hinokuni-net.jp/specials/summer/