62,434
edits
Changes
no edit summary
{| class="wikitable"
! Time period !! Development summary
|-
| 1952–1985 || Nippon Telegraph and Telephone Public Corporation (NTTPC) years.
|-
| 1985–1992 || Nippon Telegraph and Telephone Corporation (NTT) years.
|-
| 1992 || NTT Mobile Communications Network, Inc. starts operations,