TSUNEISHI SOLUTIONS TOKYOBAY Co., Ltd. (formerly Mitsui E&S Shipbuilding Co., Ltd., President: SHIBATA Kenichi; Head Office: Minato-ku, Tokyo) has entered into a collaboration agreement with Innovative Space Carrier Inc. (President: HATADA Kojiro; Head Office: Chuo-ku, Tokyo; hereinafter “ISC”) and Mitsu O.S.K. lines, Ltd. (President: HASHIMOTO Takeshi; Head Office: Minato-ku, Tokyo; hereinafter “MOL”) to commercialisation of offshore rocket launch and recovery operations.

・Utilizing Shipbuilding and Engineering Know-How to Realize Reusable Launch Vehicle Business
To achieve the goal of providing space transportation services using ISC’s reusable launch vehicle “ASCA 1”, we are developing a recovery vessel by utilizing our experience in shipbuilding and engineering to realize offshore launch and recovery technology.

Offshore rocket launch and recovery operations are already being conducted overseas using vessels, it is essential to swiftly establish and commercialize this technology in Japan to enhance international competitiveness and fully leverage the geographical advantages of the Japanese archipelago.

・Overview of the Collaboration Agreement
The three companies, TSUNEISHI SOLUTIONS TOKYOBAY, ISC, and MOL will jointly explore the following initiatives:

(1) Development of rocket recovery ship
Carefully examine the design requirements for rocket recovery ships, conduct a feasibility study to evaluate their applicability to the ASCA 1 reusable rocket developed by ISC, and proceed with verification tests to validate the findings.

(2) Feasibility study on commercialization of offshore launch vessels for rockets
Carefully examine design requirements for offshore launch vessels for rockets, conduct technical and economic feasibility studies, assess their applicability to the ASCA 1, and proceed with verification tests to validate the findings.

Message from the Director
■ Mr SEKI Hiroshi, Director of TSUNEISHI SOLUTIONS TOKYOBAY Co., Ltd., commented:
“We changed our company name to TSUNEISHI SOLUTIONS TOKYOBAY Co., Ltd. on 30 June. Formerly known as Mitsui E&S Shipbuilding Co., Ltd., our company has a legacy spanning over a century in shipbuilding. In addition to our expertise in ship design and engineering, we have developed advanced technologies in areas such as liquefied gas handling, dynamic positioning systems, and autonomous navigation. We believe these strengths will be instrumental in the development of vessels capable of supporting rocket launches and recoveries. Through these efforts, we are committed to contributing to the realisation of future space transportation using reusable rockets, while creating new value in this field.”

■ TSUNEISHI SOLUTIONS TOKYOBAY Co., Ltd. (formerly company name; Mitsui E&S Shipbuilding Co., Ltd.)
TSUNEISHI SOLUTIONS TOKYOBAY (HQ: 2-3-2, Daiba, Minato-ku, Tokyo, Japan) is a fabless engineering company which, with the core technologies of ship development, design and construction cultivated over 100 years, over 40 years of experience in constructing LNG carriers and autonomous ship maneuvering and digitalization technology, contributes to solving the issues and needs of both society and customers related to maritime transportation, such as engineering for alternative fuel, improvement of safety and working environment of ship’s crew, etc.
Company info: https://www.tsuneishi.co.jp/tokyobay/english/

President & Representative Director: SHIBATA Kenichi
Business: Engineering Service, Engineering for Alternative Fuel and Gas-related Equipment, DX・Monitoring, Technical support
Founded: May 2017 (Established: 1917)
Capital: 100 million yen
Employees: 138 (as of 1st April 2025)

For further information, please contact:

Sales Dept.
TSUNEISHI SOLUTIONS TOKYOBAY Co., Ltd.
TEL: +81-3-6426-0243