Issues with www-mmm.is.s.u-tokyo.ac.jp access could stem from improper redirect settings between different versions of the site. Check the following links for alternative routes:

http://www-mmm.is.s.u-tokyo.ac.jp https://www-mmm.is.s.u-tokyo.ac.jp

Or return to the current status page of www-mmm.is.s.u-tokyo.ac.jp.