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| JX 金属黒部ガルバ株式会社 | ||||||||
| Hitachi Alloy Co., Ltd. | ||||||||
| 有限会社 シーエス保険サービス | ||||||||
| Sunetsu Trading Co., Ltd. | ||||||||
| Sunetsu Precision Engineering Co., Ltd. | ||||||||
| Nisshin Metal Co., Ltd. |
Established Chuo Katan Co., Ltd.
Established Hachinohe Nendo Co., Ltd. in Edogawa Ward, Tokyo
Founded: June, Taisho 9 (1920)
Founded: June, Taisho 9 (1920)
Established Chuo Forging Co., Ltd.
Established Hanne Shindo Co., Ltd. in Edogawa Ward, Tokyo.
Founded in December 1937 in Edogawa Ward, Tokyo, Japan
Renamed to Kanto Communication Metals Co., Ltd. in December 1943
(Showa 20)
Relocated to Takaoka City, Toyama Prefecture due to war damage in June 1945
Established a new factory for B.M.C (Bangkok Maria Blue Corporation).
(Showa 22)
Renamed to Mitsukoshi Metal Industries Co., Ltd. in May 1947
Certified as a Japan Industrial Standard (JIS) authorized factory in September 1951
(Showa 30)
(Showa 47)
(Showa 49)
(Showa 59)
Merged with Hokuriku Metal Industries Co., Ltd. in September 1984 and renamed Sunetsu Metal Co., Ltd.
Established Sunetsu Seiko Co., Ltd. in December 1988, entering forging and machining operations
Established a new factory for B.M.C (Bangkok Maria Blue Corporation)
Established Dalian Mitsukoshi Precision Parts Industry Co., Ltd. in Dalian, China.
Established Dalian Bonded Zone Mitsukoshi Metal Industry Co., Ltd.
Established Mitsukoshi Metal (Shanghai) Guangzhou Branch in Guangzhou, China.
Listed on the Second Section of the Nagoya Stock Exchange in December 1993
(Heisei 6)
Acquired brass wire business from Sumitomo Metal Mining Co., Ltd. in April 2000
Established Dalian Mitsukoshi Precision Parts Industry Co., Ltd. in Dalian, China
(Heisei 12)
Established Dalian Free Trade Zone Mitsukoshi Metal Industry Co., Ltd.
Merged with Sunetsu Seiko Co., Ltd. in October 2002 and renamed to Precision Factory
(Heisei 13)
(Heisei 14)
(Heisei 16)
Established Mitsukoshi Metal (Shanghai) Co., Ltd. in Shanghai, China, in January 2005
(Heisei 18)
Merged with Hokuriku Zinc Co., Ltd.
E-Mekki registered with the Ministry of Land, Infrastructure, Transport and Tourism's "NETIS" (New Technology Information Provision System).
(Heisei 19)
Relocated and integrated Chokeiji Factory to the head office location. (Current Mekki Minami Factory)
Acquired all operations from Shin-Nittetsu Metal Co., Ltd. in October 2007
E-Mekki received the Excellence Award at the 2nd Monozukuri Japan Grand Prix.
(Heisei 20)
(Heisei 21)
(Heisei 22)
Established Mitsukoshi Metal (Shanghai) Guangzhou Branch in Guangzhou, China
Established CK Sanei Co., Ltd. and made the group a holding company.
(Heisei 23)
Established CK Sanei Co., Ltd.
In October, Heisei 23 (2011), transitioned to a holding company system through a company split
Transitioned to a holding company system through company split.
Transparent fittings received the Good Design Award.
Established Riken CK JV Co., Ltd.
Established Riken CKJV Co., Ltd.
Established Sanei Metal (Shanghai) Co., Ltd. Shenzhen Branch (closed Guangzhou Branch).
Established Taiwan Mitsukoshi Co., Ltd.
100th anniversary of founding.
(Heisei 25)
Acquired manufacturing equipment for tin reflow plating lines and some copper alloy wire manufacturing equipment from Furukawa Electric in June 2013
Established Riken CK JV Co., Ltd.
(Heisei 25)
Acquired plating wire business from Hitachi Cable Precision Co., Ltd. in January 2015
(Heisei 25)
100th Anniversary of Founding
In March, Heisei 27 (2015), conducted a tender offer for Nippon Shinko Co., Ltd., and became a consolidated subsidiary
In March, Heisei 27 (2015), transferred all shares of Dalian Mitsukoshi Precision Parts Industry Co., Ltd.
Conducted a tender offer for Nippon Shindo Co., Ltd. and made it a consolidated subsidiary.
Transferred all shares of Dalian Mitsukoshi Precision Components Industry Co., Ltd.
(Heisei 25)
(Heisei 25)
In March, Heisei 29 (2017), listed on the Second Section of the Tokyo Stock Exchange
Listed on the Tokyo Stock Exchange Second Section.
(Heisei 25)
In March, Heisei 30 (2018), listed on the First Section of the Tokyo Stock Exchange
Listed on the Tokyo Stock Exchange First Section.
In May, Heisei 30 (2018), established Nisshin Chiken Co., Ltd.
Established Nipshin Chikin Co., Ltd.
In November, Heisei 30 (2018), merged with Sentez Trading Co., Ltd. and Yashima Co., Ltd.
Merged with Sanei Trading Co., Ltd. and Yashima Co., Ltd.
(Heisei 25)
(Heisei 25)
(Reiwa 2)
In April, Reiwa 2 (2020), acquired shares of Okinokogyo Co., Ltd., and made it a subsidiary
Acquired shares of Okinokogyo Co., Ltd. and made it a subsidiary.
Established Taiwan Mitsukoshi Co., Ltd. in June 2020
Acquired brass rod and processed product businesses and brass wire equipment from Hitachi Alloy Co., Ltd. in July 2020
Acquired production equipment from JX Metals Kurobe Galva Co., Ltd. in August 2020
Transferred production equipment from JX Metals Kurobe Galva Co., Ltd.
Acquired production equipment from Imperial Metals Co., Ltd. in October 2020
Transferred production equipment from Teikoku Metals Co., Ltd.
Established Sanei Metal (Shanghai) Co., Ltd. Shenzhen Branch (Closed Guangzhou Branch)
(Reiwa 3)
Established Taiwan Mitsukoshi Co., Ltd.
(Reiwa 4)
In April, Reiwa 4 (2022), transitioned to the Tokyo Stock Exchange Prime Market
Transitioned to the Tokyo Stock Exchange Prime Market.
Welding saddle fittings received the Good Design Award in October 2022
Welding saddle joints awarded the Good Design Award.
(Reiwa 5)
Stainless steel pipe expansion fittings received the Good Design Award in October 2023
In October 2023, W Flange II received the Good Design Award
Stainless steel pipe expansion joints awarded the Good Design Award.
W Flange II awarded the Good Design Award.
In April, Reiwa 7 (2025), acquired shares of Mitani Shinko Co., Ltd., and made it a consolidated subsidiary
Acquired shares of Mitani Shindo Co., Ltd. and made it a consolidated subsidiary.
CK Sanets Corporation ranked 10th in the 2024 edition of the 'Best Companies to Work For' ranking. This is based on survey results from employee evaluations, and it has been ranked for 8 consecutive years.
CK Sunets Inc. was ranked 3rd in the 2023 edition of the 'Workplace with a Sense of Fulfillment' ranking in the 100-999 employees category. It has been ranked for seven consecutive years and is evaluated based on survey results emphasizing employee trust, pride, and solidarity.