Thats weird. I travel abit due to work and have accessed aigis without problems in aussie, sidney.

Fyi, most of dmm's function will be locked outside of japan(if you dont tamper with cookies/vpn) including some games but on general, most games are accessible if you go to the DMM GAMES tab.

http://www.dmm.co.jp/netgame/social/...app_id=156462/
Maybe trying this link will help, thats aigis