日本にっぽん鋼こう管かんじ字FuriganaMeanings1nounNKK Corporationcompany nameFormer Japanese steelmaker and engineering company, now part of JFE Holdings. Used as a proper noun.日本にっぽん鋼こう管かんは、かつて日本にほんを代だい表ひょうする鉄てっ鋼こうメーカーだった。NKK Corporation was once a leading steel manufacturer in Japan.
