NTT or Nippon Telegraph and Telephone Corporation worked once as a monopoly public corporation. It was owned by the Government of Japan. But in 1985 with an aim to boost up competition in the telecommunication market, NTT was privatized. The Japanese Government still is a shareholder of NTT by nearly 33%. NTT regulates on the NTT Law. Of the other Japan Telephone Operating Companies , NTT is the dominant one.

Japan Telephone Operating Companies

Japan Telephone Operating Companies are facilitating the telecommunication network in Japan with their land line and mobile operations. Not only the national companies in Japan have invested in the telecommunication market in Japan, but also the international ones.

The land line telecommunication network is supported by the following Japan Telephone Operating Companies :

KDDI

NTT

Softbank Telephone

The Japan Telephone Operating Companies serving the mobile networking in Japan are:

Softbank Mobile

Willcom

Telephone Operating Companies

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