Since its founding in 1950, Sumitomo Denetsu has operated its business based on the spirit of "placing trust first, providing services that delight customers, and contributing to societal prosperity through business development."
Founded in 1950
In April 2020, we celebrated our 70th anniversary. This milestone is thanks to the long-standing support and guidance of our customers, shareholders, and all parties involved, as well as the cooperation of our partners who have supported our business. We express our sincere gratitude once again.
In April 2020, we celebrated our 70th anniversary
In May 2025, we formulated the mid-term management plan "VISION2030 Mid-term PLAN2028"
On November 5, 18 locations including Osaka headquarters and Tokyo headquarters held the "2026 Annual Technology Research Presentation" via Teams. The company received 45 submissions, with one first prize, four second prizes, and three third prizes announced.
Effective October 1, 2026, Sumitomo Densetsu changed its name to Semlinks Co., Ltd. Under the new slogan, 'Linking with your aspirations,' its mission to build social infrastructure remains unchanged, while it aims to meet social needs across a broader range of fields.
Ahead of its October 1, 2026, name change to Semlinks Inc., Sumitomo Densetsu Co., Ltd. launched a special website on September 24. The site introduces the new name and logo, brand film, new commercial, and behind-the-scenes footage to share the company's vision and aspirations. The new commercial features Shizuka Ishibashi and includes a look behind the scenes.
Sumitomo Densetsu announced a ¥5 million donation for damage caused by the Kumamoto earthquake through the nonprofit Japan Platform. It will also match employee donations with an equal contribution. The company intends to support relief and recovery in affected areas.
Sumitomo Electric Co., Ltd. obtained the "Kurumin" certification from the Ministry of Health, Labour and Welfare in May 2026. The company is actively working to support the balance of childcare and work, improving the system and workplace environment. As a result, the rate of male employees taking childcare leave has also improved.
Sumitomo Electric Industries, Ltd.'s subsidiary Sumiden Electric Industry Co., Ltd. has decided on a new logo mark ahead of the company name change scheduled for October 1, 2026. The new logo symbolizes technology and human strength, expressing a future-oriented outlook. Going forward, we will promote the dissemination of the new company name and logo across various media.
Sumitomo Electric Co., Ltd. will change its company name to 'SemLinks' in October 2026, and has decided on a corporate group logo and slogan accordingly. The logo symbolizes 'link' and expresses the company's attitude of connecting employees and businesses. The corporate colors are purple and yellow, and the slogan embodies the ideals and aspirations.
Sumitomo Electric Systems Co., Ltd. is committed to supporting the employment and activities of para-athletes and has hired athlete Yuuta Imai as of June 1. Imai is a top athlete in deaf beach volleyball and has participated in five consecutive Deaflympics.
Sumitomo Electric Industries Co., Ltd. exhibited at JECA FAIR 2026 held at Tokyo Big Sight from May 27, 2026, for three days, and expressed gratitude to many visitors. The company displayed products such as interconnection equipment design technology and high-current busbar systems, and is accepting inquiries.
Sumitomo Denetsu Co., Ltd. acquired all shares of Chubu Electric Industry Co., Ltd. and made it a subsidiary. Chubu Electric Industry, based in Gifu Prefecture, is a company that performs overhead power line construction, and this subsidiary creation aims to strengthen power infrastructure development and construction capabilities. The share transfer is scheduled for June 2026, and the impact on performance is expected to be minimal.