| 1950 |
創業者・原田源が1950年に銅板の事業をスタートさせたことに始まります |
| 1952 |
株式会社原田伸銅所の創立 |
| 1952 |
埼玉県蕨市に工場建設 銅板の製造販売を開始 |
| 1952 |
昭和27年ごろの圧延 |
| 1952 |
Established Harada Metal Industry Co., Ltd. |
| 1952 |
Constructed a factory in Warabi-shi, Saitama Prefecture, and started the manufacture and sales of copper plates. |
| 1955 |
埼玉県戸田市へ移転 りん青銅板・条の製造を開始 |
| 1955 |
Moved to Toda-shi, Saitama Prefecture. |
| 1955 |
Started the manufacture of phosphor bronze plates and strips. |
| 1964 |
名古屋営業所開設 |
| 1964 |
Opened Nagoya sales office. |
| 1966 |
JIS表示許可認証 |
| 1966 |
Became a JIS Mark certified factory. |
| 1978 |
笹目工場新設（現在は仙台工場に集約） |
| 1978 |
我が国初の長尺巻取りインゴット化を実現 |
| 1978 |
Built Sasame Factory (currently consolidated into Sendai Factory). |
| 1978 |
Produced Japan's first long ingot coils of phosphor bronze. |
| 1984 |
代表取締役社長に原田英雄が就任 |
| 1984 |
冷間可逆4段圧延設備を導入 一貫広幅長尺工程へ移行 |
| 1984 |
Appointed Hideo Harada as President. |
| 1984 |
Introduced a 4-high reversing cold rolling mill. Started a continuous wide-width and long-length process. |
| 1987 |
生産工程管理のコンピュータオンラインシステム導入 |
| 1987 |
Introduced an online computer system for production process control. |
| 1992 |
製品スリット事業開始 |
| 1992 |
Started products slitting business. |
| 1994 |
仙台工場第一期工事完成 |
| 1994 |
新設溶解・鋳造工程稼働 |
| 1994 |
Completed Sendai Factory first-stage construction. |
| 1994 |
Started operation of the new melting and casting line. |
| 1996 |
轟事業所完成 HOT-DIPすずめっき事業開始 |
| 1996 |
Built Todoroku Factory. |
| 1996 |
Started HOT-DIP tinning business. |
| 1999 |
仙台工場第二期工事完成 |
| 1999 |
新設焼鈍・圧延工程稼働 |
| 1999 |
ISO9002認証取得（現在ISO9001：2015） |
| 1999 |
Completed Sendai Factory second-stage construction. |
| 1999 |
Started operation of the new annealing and rolling mill line. |
| 1999 |
Obtained ISO 9002 certification (currently ISO 9001:2015). |
| 2002 |
仙台工場第三期工事完成 |
| 2002 |
新設連続焼鈍・仕上圧延工程稼働 |
| 2002 |
Completed Sendai Factory third-stage construction. |
| 2002 |
Started operation of the new continuous annealing and finish rolling mill line. |
| 2005 |
ISO14001：2004認証取得（現在ISO14001：2015） |
| 2005 |
Obtained ISO 14001:2004 certification (currently ISO 14001:2015). |
| 2006 |
本社社屋竣工 |
| 2006 |
Completed Headquarters office building. |
| 2008 |
代表取締役社長に原田真理生が就任 |
| 2008 |
Appointed Mario Harada as President. |
| 2010 |
仙台工場第四期工事完成 |
| 2010 |
新設スリッター・自動倉庫稼働 |
| 2010 |
Completed Sendai Factory fourth-stage construction. |
| 2010 |
Started operation of the new slitting line and automatic warehouse. |
| 2013 |
中国販売会社：原田伸銅商貿（深圳）有限公司設立 |
| 2013 |
Established Harada Metal Industry (Shenzhen) Co., Ltd. in China. |
| 2018 |
地域未来牽引企業選定（経済産業省） |
| 2018 |
Selected as a Driving Company for the Regional Future by Ministry of Economy, Trade and Industry. |
| 2020 |
可逆式冷間20段圧延機導入 |
| 2020 |
Introduced a 20-high reversing cold rolling mill. |
| 2024 |
IATF16949:2016（仙台工場、轟事業所）認証取得 |
| 2024 |
Obtained IATF 16949:2016 certification (Sendai Factory, Todoroku Factory). |
