| 1897-04 |
住友本店が日本製銅株式会社を買収し『住友伸銅場』を大阪市の安治川に開設 |
| 1897-04 |
Sumitomo Head Office purchased Japan Copper Manufacturing Co., Ltd. and established Sumitomo Copper Plant in Ajikawa, Osaka. |
| 1913-06 |
住友総本店が『住友伸銅所』と改名 |
| 1913-06 |
Sumitomo General Head Office changed the name to Sumitomo Copper Works. |
| 1921-02 |
住友総本店が住友合資会社に改組し『住友合資会社 伸銅所』となる |
| 1921-06 |
Sumitomo General Head Office was reorganized as Sumitomo Goshi Kaisya and Sumitomo Copper Works became Sumitomo Goshi Kaisya Copper Works. |
| 1935-09 |
『住友伸銅鋼管株式会社』が『株式会社住友製鋼所』を吸収合併し『住友金属工業株式会社』となる |
| 1935-09 |
After Sumitomo Steel Tube & Copper Works, Ltd. merged with Sumitomo Steel Works, Ltd., became Sumitomo Metal Industories. |
| 1941-09 |
住友金属工業株式会社が名古屋軽合金製造所を設置 |
| 1941-09 |
Sumitomo Metal Industories established Nagoya Light Alloy Works (Minato-ku, Nagoya). |
| 1959-08 |
住友金属工業株式会社からアルミ圧延・伸銅部門が分離して『住友軽金属工業株式会社』を設立 |
| 1959-08 |
Sumitomo Light Metal Industories, Ltd. was established by separating the Aluminium Products and Copper Products Divisions from Sumitomo Metal Industories. |
| 1969-03 |
After separating the Copper Products Division from Sumitomo Light Metal Industories, Sumikei Copper Industries,Ltd. was established at its present location, City of Toyokawa. |
| 1969-04 |
住友軽金属工業株式会社から伸銅部門を分離して当社の前身となる『住軽伸銅工業株式会社』を現在の豊川市に設立 |
| 1985-04 |
再び『住友軽金属工業株式会社』と合併、同社の『伸銅所』となる |
| 1985-04 |
After merging with Sumitomo Light Metal Industories, Ltd., become Copper Works. |
| 1990 |
『スミケイマレーシア』設立（現 NJT銅管マレーシア） |
| 1990 |
Sumikei (Malaysia) Sdn. Bhd. was established (Present NJT Copper Tube (Malayisia) Sdn. Bhd.). |
| 2011 |
『住友軽金属工業株式会社』から分社となり『株式会社住軽伸銅』を設立 |
| 2011 |
Sumikei Copper Tube Co., Ltd. was established as a spin-off from Sumitomo Light Metal Industories , Ltd. |
| 2013-10 |
『住友軽金属工業株式会社』と『古河スカイ株式会社』が統合、『株式会社UACJ』となり当社は『株式会社UACJ 銅管』に商号変更 |
| 2013-10 |
Following the merger of Sumitomo Light Metal Industories , Ltd., and Furukawa-Sky Aluminum Corporation to establish UACJ corporation, the company name was changed to UACJ Copper Tube Corporation. |
| 2019-10 |
UACJ グループから資本独立し、商号を『NJT銅管株式会社』に変更 |
| 2019-10 |
The Compnay received capital independence from the UACJ Group, and its name changed to NJT Copper Tube Corporation. |
| 2021-04 |
当社100％出資の連結子会社である『ＮＪＴ銅管販売株式会社』、『ＮＪＴ銅管パッケージ株式会社』、『東洋フイツテング株式会社』、『ＮＪＴ銅管グリーンサービス株式会社』を吸収合併 |
| 2021-04 |
NJT Copper Tube Corporation absorbed its domestic consolidated subsidiaries; NJT Copper Tube Sales Corporation, Toyo Fitting Co., Ltd., NJT Copper Tube Packaging Corporation, NJT Green Service Corporation. |
