As we all know Japan telecommunication is very complicated .In summer 1999, the giant Nippon Telegraph and Telephone Corp. (NTT) was divided into two local telephone companies (NTT East and NTT West) and a long distance telephone company (NTT Long distance). And the three major companies, Daini-Denden, Japan Telecom, Nihon Kosoku Tsushin, and Tokyo Tsushin Network, entered the long distance market after it became competitive in 1985. These "New Communications Companies" (NCCs) had 23% share (based on number of calls) in 1997, while NTT had 77%. International Japan telecommunication market is dominated by KDDI with 60% share.
When you arrive in Japan and get Japan telecommunication, once you install a telephone, you will find you have to pay $700. Its very expensive. And you should pay refundable 72,000 yen for the commonly called "telephone subscribing right" (Denwa Kanyu Ken), you may not familiar with Japan telecommunication and find it difficult to choose one that suit you well, so, MyJapanPhone will introduce the Japan telecommunication here, hope it can help you:
Japan Home Phones
Japan Portable Phones
Japan Public Telephones
Japan Pocket Bells
Japan Telephone Tips