This is the 3663rd most frequent Japanese word.
ntt
"NTT" is not a Japanese word but an abbreviation for "Nippon Telegraph and Telephone Corporation," a major Japanese telecommunications company.
Used as the name of a company.
NTTは日本の主要な通信会社です。
NTT is Japan's major telecommunications company.
Referring to the company while discussing its activities.
今年、NTTは新しいサービスを導入しました。
This year, NTT has introduced a new service.
Used possessively to discuss contributions.