Battery Storage Partnership
2025-04-18 01:21:31

Mitsui Sumitomo Trust Bank and RS Asset Advisors Collaborate on Battery Storage Business

Mitsui Sumitomo Trust Bank and RS Asset Advisors Unite to Boost Battery Storage Sector



In a significant move towards enhancing Japan's renewable energy sector, Mitsui Sumitomo Trust Bank and RS Asset Advisors have announced their collaboration to establish a new asset management company, RSBM Co., Ltd. This partnership aims to focus on the management of systemic battery storage operations, aligning with Japan's ambitious energy policy goals.

The Japanese government has set an objective to increase the ratio of renewable energy sources in its power generation mix to up to 50% by 2040. As such, the role of large-scale battery storage systems, which provide essential stability to the power supply, is expected to see rapid growth. The collaboration between these two companies capitalizes on RS Asset Advisors' extensive expertise and experience in the renewable energy sector and Mitsui Sumitomo Trust Bank’s commitment to creating a sustainable cycle of funds, assets, and capital in this space.

The Purpose of the Joint Venture



RSBM Co., Ltd. aims to accelerate the adoption of large-scale battery storage systems across Japan. The new company will leverage RS Asset Advisors' capabilities in site selection and development, coupled with Mitsui Sumitomo Trust Bank’s financial insights, to establish an efficient asset management business surrounding battery storage technologies. The synergy between their respective knowledge and methodologies will significantly contribute to the realization of renewable energy as a primary power source in Japan.

Company Profiles



Mitsui Sumitomo Trust Bank


  • - Headquarters: Marunouchi 1-4-1, Chiyoda, Tokyo
  • - CEO: Kazunari Ooyama
  • - Founded: July 1925
  • - Business Focus: Trust and banking services

RS Asset Advisors


  • - Headquarters: Roppongi Hills Cross Point 6F, 6-3-1 Roppongi, Minato, Tokyo
  • - CEO: Yuji Hirabayashi
  • - Founded: August 2022
  • - Business Focus: Arrangement and investment services for battery storage and renewable energy funds, alongside related operations.

Looking Ahead



Both companies are keen on harnessing their strengths to fulfill Japan's energy transformation objectives. As the push towards renewable energy intensifies, the establishment of RSBM Co., Ltd. represents a proactive step in reinforcing the infrastructure necessary for a resilient and sustainable energy future.

For further inquiries regarding this collaboration, you can contact:
  • - Mitsui Sumitomo Trust Bank: Public Relations Department, Email: kohoa@smtb.jp
  • - RS Asset Advisors: Email: rsaa@rs-holdings.co.jp

This partnership marks a notable phase in Japan’s movement toward a greener energy policy and a robust commitment to the advancement of sustainable solutions in the energy sector.

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