http://www.post.japanpost.jp/english/index.html
Japanese Postal Service

http://www.kuronekoyamato.co.jp/english/index.html
Yamato Transport

http://www.ntt.co.jp/index_e.html
NTT Phone, Internet, and other communication service

http://www.kddi.com/english/index.html
KDDI Phone, Internet, and other communication service

http://www.nttdocomo.co.jp/english/
NTT Docomo Mobile phone vendor

http://www.au.kddi.com/english/index.html
AU Mobile phone vendor