Announced details
In March 2024, Sankyo Seiko invested in ユナイテッドシルク株式会社, and the 2 companies began exploring new businesses through a business alliance. In January 2025, they added 新菱冷熱工業株式会社 and began discussions on a 3-company collaboration. The 3 companies jointly registered the trademark. 新菱冷熱工業株式会社 will supply cocoons, ユナイテッドシルク株式会社 will manufacture, process, and sell silk powder, and ユナイテッドシルク株式会社 and Sankyo Seiko will handle product planning and sales.
ユナイテッドシルク株式会社 is a venture company headquartered in Matsuyama, Ehime Prefecture, established in April 2016. 新菱冷熱工業株式会社 is based in Shinjuku-ku, Tokyo, and specializes in engineering and design for air-conditioning systems. It is involved in the construction of large buildings, commercial facilities, and factories, as well as the installation of heating and cooling systems.
The “Smartsilk® (Smart Silk)” trademark was jointly registered by the 3 companies. Registration number, registration date, and validity period: not disclosed
Matsuyama, Ehime Prefecture (head office of ユナイテッドシルク株式会社), Imabari, Ehime Prefecture (Setouchi Silk Factory), Tsukuba, Ibaraki Prefecture (Smartsilk Hub™ within Shinryo Corporation’s Innovation Hub)
In this announcement the company addresses none of Contract Value / Offering price / Impact on Business Performance.
| Item | Details |
|---|---|
| Names of Products / Services Covered | Smartsilk® (Smart Silk), MayuFacture®, Smartsilk Hub™, Silk Powder |
| Counterparty | ユナイテッドシルク株式会社, 新菱冷熱工業株式会社 |
| Counterparty overview | ユナイテッドシルク株式会社 is a venture company headquartered in Matsuyama, Ehime Prefecture, established in April 2016. 新菱冷熱工業株式会社 is based in Shinjuku-ku, Tokyo, and specializes in engineering and design for air-conditioning systems. It is involved in the construction of large buildings, commercial facilities, and factories, as well as the installation of heating and cooling systems. |
| Relationship with the Company | In March 2024, Sankyo Seiko invested in ユナイテッドシルク株式会社, and the 2 companies began exploring new businesses through a business alliance. In January 2025, they added 新菱冷熱工業株式会社 and began discussions on a 3-company collaboration. The 3 companies jointly registered the trademark. 新菱冷熱工業株式会社 will supply cocoons, ユナイテッドシルク株式会社 will manufacture, process, and sell silk powder, and ユナイテッドシルク株式会社 and Sankyo Seiko will handle product planning and sales. |
| Launch date | 7 September 2026 (the announcement date stating that the 3-company collaboration had become fully operational; product launch date: not disclosed) |
| Applicable area | Yarn, Textiles, Apparel, Bags, Cosmetics, Beverages, Food |
| Registration number and expiry date | The “Smartsilk® (Smart Silk)” trademark was jointly registered by the 3 companies. Registration number, registration date, and validity period: not disclosed |
| Location | Matsuyama, Ehime Prefecture (head office of ユナイテッドシルク株式会社), Imabari, Ehime Prefecture (Setouchi Silk Factory), Tsukuba, Ibaraki Prefecture (Smartsilk Hub™ within Shinryo Corporation’s Innovation Hub) |
Items this document does not state (10)
These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.
The reasons the company gives
The company's own explanation, not something inferred from the numbers.The 3 companies are seeking to develop the market for products derived from silkworm cocoons. Sankyo Seiko is responsible for creating new businesses and diversifying its operations, United Silk for the manufacture, processing, and sale of silk materials, and Shinryo Corporation for supplying raw materials through its smart sericulture system.