| Company name | Group | Parent | Subsidiary | Customer | Supplier | Alliance | Bank | Shareholder |
|---|---|---|---|---|---|---|---|---|
|
|
||||||||
|
|
||||||||
|
|
||||||||
| 株式会社宇治川工業 |
Founded Nagai Steel Works at the combined paper factory of Chikafune (now Osaka Paper location)
Relocated to Jōkōji, Amagasaki-shi and established Nagai Steel Works Co., Ltd.
Establishment
Built a new factory to accommodate larger and higher-precision paper machines
Since the construction of a new factory to accommodate larger and more precise paper machines, we have continued to manufacture paper machine equipment. In recent years, we have particularly developed an automatic unloading mechanism using a transcribing roll in a winders that eliminates winding slack, contributing to labor savings and productivity improvement through time reduction.
Received increased orders for winders from overseas. In SKIC (Thailand) and VKPC (Vietnam), we produced new winders using our own NC slitter in bulk
Developed and introduced a device that allows a single operator to feed paper with a winder (Amagasaki Plant M8)
Developed and introduced a device that allows a single operator to pass paper using a winders (RenGo Amagasaki Factory).
Advanced the development of trim air conveyor equipment, achieving a 250 mm wide trim air conveyor (Tonegawa Plant M4)
Advanced the development of trim air-transport equipment, achieving a 250 mm wide trim air-transport system (RenGo Tonegawa Paper Factory).
Developed and introduced an automatic paper tube cutting and supply device for winders (RenGo Yashio Factory).
Developed and introduced an automatic paper tube cutting and supply device for winders (Yashio Plant M5)
Developed reel automatic transfer equipment and designed and manufactured it in bulk up to the winder (Kintan Plant M2)
Developed a reel automatic transfer system and designed and manufactured it in one go up to the winders (RenGo Kanazawa Factory).
Became a 100% subsidiary of Rengo Co., Ltd.
RenGo Co., Ltd. became a group company.
Celebrated its 70th anniversary.
RenGo Co., Ltd. signed a sponsorship agreement with the handball team Golden Wolves Fukuoka. The team's league opening match in the H division was held on October 12 in Izumiotsu City, Osaka Prefecture, and employees visited to cheer. Although the team did not win, they enjoyed an exciting game and look forward to future success.
The website of Enai Tekkō Co., Ltd. has been renewed. It now provides content that better conveys the company's strengths and the expressions of its employees. Continuing the trust and technology we have cultivated, we aim to meet customers' expectations while striving to further enhance information dissemination and content quality in the future.
On July 14, 2026, Nagai Steel Co., Ltd. received the RenGo Group Performance Improvement Effort Award for FY2025. An award ceremony was held within the company, and President Kawamoto of RenGo Co., Ltd. and Executive Director Nishi presented the certificates and trophies.
Nagai Steel Co., Ltd. is advancing a homepage renewal aimed at improving the company’s image and addressing recruitment challenges. In addition to internal photos and interviews, product photography and customer interviews will be conducted at the RenGo Yashio Factory and Amagasaki Factory, planning a rich content upgrade.
We invited a shinto priest to conduct the Aratake Inari Festival. We expressed gratitude for reaching the 70th anniversary and prayed together as employees that we can continue to meet customers' expectations without accidents or disasters. We also plan to renew the lanterns and landscaping of the Inari shrine.
Eikuni Ironworks Co., Ltd. celebrated its 70th anniversary on February 28, 2026. The company expressed gratitude to its business partners, stakeholders, and the local community for their ongoing support, and requested continued patronage in the future.
Tetsuko Engineering Co., Ltd. announced its New Year's greeting. In preparation for the 70th anniversary in February, the company will change its work uniforms to feature a new company logo and renovate the interior of its headquarters office, aiming to refresh its atmosphere and work with renewed vigor. It continues to call for continued patronage of its products and technology.
The NT TECH Team LL from the Sales Department of Nagai Ironworks participated in the Small Group Improvement Presentation Conference of the Paper Division at Rengo Co., Ltd. They presented on the theme of "Visualizing Process Management" and, after receiving feedback on DX promotion during the evaluation, are discussing the issues within the company. They will continue to improve work processes and strive to enhance customer satisfaction and contribute to the group’s profitability.
Three students from Amagasaki City Amagasaki Double Star High School experienced the operations of the design, control, and manufacturing departments over a three-day period. This is the third time this year, and the company expressed gratitude to the participants and welcomed next year's involvement.
The Osaka-Kansai Expo concluded, and on September 25, BLUE OCEAN DOME achieved 1 million visitors. The machine manufactured by our company, used for producing paper tube raw material displayed in the exhibition, was active, and visitors could see the paper tube raw material used on the ceiling of Dome C.