Tokorozawa City is in the southwest of Saitama Prefecture and has developed as a commuter town of Tokyo. It is noted as a verdant area with groves of mixed trees in the Musashino area and Sayama Hills as well as agriculture, with thriving Sayama Tea and outdoor-grown vegetables industries.

Local new power supplier with renewable energy ratio of 84%

On June 7, 2018, Mayor Masato Fujimoto of Tokorozawa City announced the city would start implementing "Tokorozawa-version RE100." "RE100" is an international initiative, in which enterprises advocate the goal of procuring 100% of the electricity needed for their business operation from renewable energy.

In Japan, many companies such as Ricoh Co Ltd, Fujitsu Ltd and Aeon Co Ltd have joined the initiative while the Foreign Affairs and Environment ministries have announced their commitment to RE100. Tokorozawa City seems to be the first municipality that has engaged with the concept of RE100. The city aims to derive electricity used at its main government building and other symbolic public facilities "100% from renewable energy."

Tokorozawa City has already steadily taken measures toward increased adoption and utilization of renewable energy.

On May 28, 2018, Tokorozawa City, JFE Engineering Corp (Chiyoda-ku, Tokyo), Hanno-Shinkin Bank and Tokorozawa Chamber of Commerce and Industry established s local new electric power company, Tokorozawa Future Electric Power Corp. Using such renewable energy as local solar and waste power generation as its primary power source, the company is slated to start supplying electricity to the city's public facilities and private consumers using high-voltage power in series from October 2018.

In the business plan, the new power company is planning to expand its supply scale from the initial 9.9MW in fiscal 2018 to 43MW by its fifth fiscal year of 2022.

The renewable energy-based power supply is expected to account for 84% of all its power supply in 2019 (including FIT-based power and unused energy). The breakdown is as follows: 5% by biomass in the city, 1% by solar in the city and 78% by biomass both inside and outside of the city. The remaining 16% will be procured from Japan Electric Power Exchange (JEPX). Biomass power generation is primarily associated with waste power generation (Fig. 1).

Fig. 1: Framework of Tokorozawa City's new electric power project (source: Tokorozawa City)