Issues with webkoukai-server.kumamoto-kmm.ed.jp access could stem from improper redirect settings between different versions of the site. Check the following links for alternative routes:

http://webkoukai-server.kumamoto-kmm.ed.jp https://webkoukai-server.kumamoto-kmm.ed.jp

Or return to the current status page of webkoukai-server.kumamoto-kmm.ed.jp.