OTS, through its special purpose company Kunishitaike Mega Float LLC, has signed a virtual power purchase agreement (VPPA) with Japan Semiconductor, a unit of Toshiba Electronic Devices & Storage. The agreement concerns the supply of non-fossil certificates (NFCs) linked to the output of a 7.8MW floating solar power plant located in Miki, Kagawa Prefecture.
The plant, expected to be commissioned by the end of December 2025, is projected to generate approximately 10.4GWh of electricity annually. Digital Grid will serve as the aggregator, selling the electricity on the wholesale market and managing the transfer of certificates to Japan Semiconductor. The operation was arranged via Digital Grid’s RE Bridge matching platform.
One of the country’s largest floating solar projects
Installed on the Kunishitaike reservoir, the facility is among the largest floating photovoltaic plants in Japan. It stands alongside Kyocera TCL Solar’s 13.7MWDC Chiba-Yamakura Floating Mega Solar, commissioned in 2018. This type of deployment reflects the growing interest in using water surfaces for energy generation amid limited availability of suitable land for large-scale ground-mounted solar projects.
Nagoya-based OTS has historically focused on developing solar power plants under the Feed-in Tariff (FIT) scheme. The company is now expanding into projects structured under Power Purchase Agreements (PPAs), in line with evolving trends in the low-carbon electricity market.
Multiple agreements for Toshiba Electronic Devices
This deal follows other initiatives by Toshiba Electronic Devices & Storage, which recently signed off-site power purchase agreements with Kansai Electric Power and Hokuriku Electric Power. Together, these agreements are expected to reach a combined capacity of 24MW once fully operational.
OTS had previously signed a similar virtual PPA with Sony Group. These agreements confirm the company’s strategy to strengthen its position in the emerging market of virtual power contracts while capitalising on unconventional energy assets amid growing demand for decarbonised supply.
