noun
NKK Corporation
Former Japanese steelmaker and engineering company, now part of JFE Holdings. Used as a proper noun.
日本鋼管は、かつて日本を代表する鉄鋼メーカーだった。
NKK Corporation was once a leading steel manufacturer in Japan.
From 日本 (Japan) + 鋼管 (steel pipe), reflecting the company's original focus on steel pipe manufacturing.