Shizen Energy completes and begins commercial operations of a solar power plant in Otaki village, Nagano prefecture


Shizen Energy Inc. (“Shizen Energy”) completed a solar power plant(“the plant”) in Otaki village, Nagano prefecture and started its commercial operation.

The plant is constructed on an approximately 3ha sized former ski area located in Otaki village, Nagano Prefecture and the annual output is expected to be approximately 2.9 MWp(DC). Shizen Energy led development and fundraising and juwi Shizen Energy Inc.(Representative director: Jan Warzecha) led EPC(Engineering, Procurement and Construction).

Shizen Energy will lead asset management, juwi Shizen Energy Operation Inc.(Representative director: Tetsushi Hanayoshi, Jan Warzecha) will lead O&M(Operation and Maintenance) after commercial operation starts.

The project site for this project is owned by Otaki Village, and we have been preparing for the start of the project in cooperation with the village. We have also signed an agreement with the village to link this project to the development of a sustainable village, and we plan to use part of the revenue from the sale of electricity from the plant to support education and other community projects in the village.

With the PURPOSE of “We take action for the blue planet”, Shizen Energy Group is committed to building renewable energy power plants around the world and expanding the use of safe and sustainable electricity in order for more people to continue to live happily on this planet. We will continue to accelerate the realization of a “100% renewable energy world” through the development, construction, operation, and maintenance of high-quality, locally-based renewable energy power plants in collaboration with our partners around the world.

【Project Outline】

Project Name

Otaki village former ski area (on ski course) solar power plant


Otaki village Kiso county, Nagano prefecture

Power Generation Company

Otaki village solar power plant LLC.

Project Development

Shizen Energy Inc.

EPC(Engineering, Procurement and Construction)

juwi Shizen Energy Inc.

O&M(Operation and Maintenance)

juwi Shizen Energy Operation Inc.


approx.2,918,000 kWp

Estimated annual generated energy output

approx. 389,000kWh/year

(equivalent to the annual electrical power use of 600 households (*))

Start of Operation

November 2021



* Estimated annual generated energy output and its conversion to the number of households are of our own independent calculations.

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Shizen Energy Inc., Branding & Communication Department