In order to use internet, you need to have 2 contracts here in Japan. One is the Network Service Carrier and the other is the Internet Service Provider.
Here are some Internet Service Providers available in Japan offering services in English.
Fusion GOL: http://home.gol.com/english/index.html
Variety of services, including technical support by native English and Japanese speaking staff.
Asahi Net: http://asahi-net.jp/en/
One of the largest Internet Service Providers in Japan, with overseas access points.
EAccess: http://www.eaccess.net/en/index.html
Provides ADSL lines to numerous ISPs and site includes a system to locate the NTT switching center.
SpinNet: http://www.spinnet.jp/indexe.html
High quality Internet service provided by Softbank Telecom with full support in English.
SonixNet: http://www.asolutions.co.jp/services/SonixNet_ISP.htm
SonixNet is provided by Assist Solutions through NTT Group’s backbone network system.
info@plazahomes.co.jp