NKK is an abbreviation and may refer to:
*
NKK switches (NKK SWITCHES CO., LTD.)
*
JFE Holdings, Inc., a corporation formed in 2002 with the merger of NKK (Nippon Kokan, unrelated to Nihon Kaiheiki) and Kawasaki Steel Corporation.
*
Nordisk Kemiteknolog Konferens, an annual conference for engineering students from the four Nordic countries: Denmark, Finland, Norway and Sweden.
*
Norrköpings KK, a Swedish swim team.
*Nippon Kinkyori Airways, now
Air Nippon
was a regional airline based in the Shiodome City Center complex in Minato, Tokyo, Minato, Tokyo, Japan.
It was a wholly owned subsidiary of All Nippon Airways (ANA). Its main base was Haneda Airport, Tokyo International Airport.
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