Renewable Energy
Energy Business
MIRARTH HOLDINGS Group promotes Energy Business that utilize renewable sources to contribute to the reduction of CO₂ emissions, a major greenhouse gas. Since entering the Energy Business market in 2013, our Group has developed large-scale and small to mid-sized solar power plants across Japan, often on underutilized land. In addition to solar, we are also engaged in other renewable energy businesses such as wind and biomass. As of the end of March 2025, our Group's operating generation scale(cumulative) reached 385 MW.
Solar Power Generation
LEBEN Solar Kagoshima Osaki 1 and 2 Solar Power Plants
LEBEN Solar (LS) Kagoshima Osaki 1 and 2 Solar Power Plants comprise four sites with a combined output of approximately 22 MW. The facilities generate around 26.6 million kWh annually, equivalent to the yearly electricity consumption of roughly 7,800 households. All electricity produced is sold to general transmission and distribution operators under the FIT system.
As part of flood control efforts, seven stormwater retention ponds have been also installed. Despite the large scale of the facilities, the plants are designed with careful consideration for the surrounding environment.
This is the second largest solar power station developed by MIRARTH HOLDINGS Group to date, following LS Chiba Katsuura Power Plant, which has a capacity of approximately 30 MW.
| Location | 3970-1 Aza Namikidan, Nogata, Osaki-cho, So-gun, Kagoshima Prefecture, Japan, and others |
| Area | Approximately 370,000 ㎡ |
| Generation Capacity | 22,366.8 kW |
| Estimated Annual Generation | Approximately 26.6 million kWh |
| Feed-in Tariff | 18 yen/kWh |
Specified Wholesale Supply to UPDATER
MIRARTH Energy Solutions has signed a specified wholesale supply agreement with UPDATER.
Through this agreement, electricity generated from renewable energy sources at 40 power plants owned by MIRARTH Energy Solutions, located across 17 prefectures and with a total output of approximately 21,140 kW, will be supplied to companies under contract with UPDATER.
Green Energy LLC, whose assets are managed by MIRARTH Asset Management, has signed a specified wholesale supply agreement with UPDATER for LS Chiba Sammu East and West Power Plants. Electricity generated at these plants will be supplied through UPDATER to households that opt for low-impact energy and to companies pursuing environmentally responsible business practices.
Specified Wholesale Supply to Osaka Gas
MIRARTH Energy Solutions has entered into a specified wholesale supply agreement with Osaka Gas. In March 2022, the two companies signed the Memorandum of Understanding on Joint Development of Solar Power Businesses and have maintained an ongoing partnership since.
With the signing of this agreement, electricity generated from 66 power plants owned by MIRARTH Energy Solutions, located across 14 prefectures with a total output of approximately 24,162 kW, will be supplied to a wide range of consumers. The electricity, which carries environmental value attributes, will primarily serve companies participating in RE100 through contracts with Osaka Gas.
Power Purchase Agreement Signed with Toho Gas
MIRARTH Energy Solutions has signed an electricity purchase agreement with Toho Gas to promote and expand renewable energy in the Chubu region.
Under the agreement, Toho Gas will procure and supply customers with 100% renewable electricity and its associated environmental value. The electricity will be generated by solar power plants that MIRARTH Energy Solutions will develop and operate in the Chubu region, with a total installed capacity of approximately 1.6 MW.
Specific Agreement Signed with Hokuriku Electric Power Company for Off-Site Corporate PPA
MIRARTH Energy Solutions has concluded a specific agreement with Hokuriku Electric Power Company for an off-site corporate PPA *. This agreement follows a Basic Agreement concluded between the two companies in September 2023 to promote off-site corporate PPAs.
Under this agreement, Hokuriku Electric Power Company will procure and supply renewable electricity generated by solar power plants that MIRARTH Energy Solutions plans to develop in the Shikoku region, with a total installed capacity of approximately 1.3 MW. By purchasing electricity from these facilities, consumers are expected to contribute to the expansion of new renewable energy sources.
- *A contract arrangement in which renewable electricity generated in a remote location is supplied to a demand location via a retail electricity provider through the power grid.
On-site PPA Power Supply Agreement Concluded with Yamanashi Prefecture
MIRARTH Energy Solutions has entered into a power supply agreement with Yamanashi Prefecture for an on-site PPA *. Under the agreement, MIRARTH Energy Solutions will supply Yamanashi Prefecture with renewable electricity generated by solar power facilities that MIRARTH Energy Solutions will develop at five public sites in the prefecture, with a total installed capacity of approximately 337 kW. By purchasing the power generated from these facilities, the prefecture is expected to promote additionality by driving the growth of new renewable energy sources.
- * A contract arrangement in which renewable electricity is supplied from power generation facilities installed on-site at the demand location.
On-site PPA Power Supply Agreement Signed with Sapporo City
MIRARTH Energy Solutions has signed a power supply agreement with Sapporo City, Hokkaido for an on-site PPA. Under this agreement, renewable electricity generated by a solar power system installed at the Hippopotamus and Lion Exhibit in Maruyama Zoo, managed by the Sapporo City Environmental Bureau, will be supplied directly to the facility. The system has a capacity of 49.5 kW and a total output of 70.55 kW. By purchasing the electricity generated from this system, the city is expected to support the expansion of new renewable energy sources.
Basic Agreement Signed with TEPCO Energy Partner, Inc.
MIRARTH Energy Solutions has signed an agreement with TEPCO Energy Partner, Inc on a solar power generation business to promote off-site corporate PPAs.
Under this agreement, renewable energy generated at MIRARTH Energy Solutions' own power plants will be systematically supplied to consumers through TEPCO Energy Partner, which serves as a retail electricity provider, in order to meet its customer needs. The initiative will primarily target companies participating in RE100, delivering non-fossil energy value to a broad range of users.
Wind Power Generation
MIRARTH Wind Power Hokkaido Otobe Power Station
MIRARTH Wind Power Hokkaido Otobe Power Station consists of two wind turbines, each approximately 120 meters tall with an output of 2,300 kW. Each 78-meter tower supports a large rotor blade about 41 meters in length, offering a design optimized for both generation efficiency and operational stability. The plant's estimated annual output is around 10.058 million kWh, equivalent to the annual electricity consumption of approximately 2,400 average households. This contributes to a reduction of about 5,300 tons of CO₂ emissions.
This is the first onshore wind power station in Otobe Town and the second wind project by MIRARTH HOLDINGS Group.
| Location | 547-6, Aza Genna, Otobe-cho, Nishi-gun, Hokkaido, and 10 other land lots (lot number) |
| Generation Capacity | 4,600 kW |
| Estimated Annual Generation | Approximately 10.058 million kWh |
| Feed-in Tariff | 22 yen/kWh |
Biomass Power Generation
Fujisan Asagiri Biomass Plant
Fujisan Asagiri Biomass Plant is operated by Fujisan Asagiri Biomass LLC, jointly funded by MIRARTH HOLDINGS. Electricity generated at the plant is supplied to eastern Shizuoka Prefecture through a regional utility company.
The plant generates biomass electricity using cow dung collected from members of the Fuji Kaitaku Agricultural Cooperative Association. The dung is fermented to produce biogas, which is then burned to generate power. This method results in lower CO₂ emissions compared to direct combustion of wood chips or other combustible waste. Additionally, the liquid fertilizer produced alongside the biogas is marketed as Fujisan Asagiri Biomass Liquid Fertilizer and is sold to various sectors, contributing to a reduction in chemical fertilizer use.
The power generation facilities also repurpose a site previously used in the Ministry of the Environment's "Model Project for Environmentally Harmonized Biomass Utilization." Reusing a structure originally slated for demolition also helps reduce carbon emissions that would have resulted from the demolition process.
Entering the biomass fuel conversion business using Cambodian cashew nut shells
MIRARTH Energy Solutions established MIRARTH Agri Tech Co., Ltd. (Cambodian subsidiary) in February 2024 to enter the biomass fuel conversion business using Cambodian cashew nut shells.
The company aims to contribute to the economic development of Cambodia, whose GDP per capita is about one-twentieth compared to Japan, by constructing a new plant to expand local employment and to improve labor productivity by introducing Japanese manufacturing operation technology. The Company will promote the diversification of their business portfolio by expanding business bases overseas, which were previously limited to within the country.
Agreement Reached with Nuts2 B.V. for Cashew Nut Shipments
MIRARTH Agri Tech Co., Ltd. has signed a shipping agreement with Nuts2 B.V., a Netherlands-based company, and successfully launched its first continuous shipment from Cambodia to Europe in November 2024. The exported cashew nuts met stringent European quality standards, with approximately 16 tons shipped per 20-foot container.
In June 2024, cashew nuts produced at our factory received the Honorary Award at the Cashew Nuts Outstanding Processors Competition 2024, hosted by the Department of Ago-Industry of the Ministry of Agriculture, Forestry and Fisheries. The award recognized our rigorous hygiene management and acquisition of a manufacturing license. Since the factory began full-scale operations in July 2024, we have conducted wholesale distribution of around 25 tons within Cambodia, earning strong praise from partners for our quality control. These ongoing efforts have gained recognition both locally and internationally, leading to this milestone shipment to Europe.
By March 2025, we had shipped a total of approximately 250 tons in FY2024. For FY2025, we plan to further expand production capacity by introducing dryers and color sorters. We are also progressing with a biomass fuel initiative that utilizes cashew nutshell residue, supported by a grant from the Japan Cooperation Center for Petroleum and Sustainable Energy (JCCP). This project focuses on enhancing oil extraction technology and evaluating the efficiency of biomass fuel utilization. In addition to shell residue, we are exploring the use of fast-growing mature cashew trees and thinned wood as potential biomass resources.
Business Partnership with PowerX for Grid Storage Plant Development
MIRARTH Asset Management has signed a memorandum of understanding with PowerX for a business alliance in the grid-storage plant business. As the first joint project, the two companies are working toward the launch of MIRARTH Storage Battery Kanagawa Aikawa Storage Plant (hereinafter, the "Storage Plant") in Aikawa Town, Aiko District, Kanagawa Prefecture.
The Storage Plant has a rated capacity of 7,403 kWh and is intended to contribute to stable electricity supply and optimal demand-supply balance by serving as a balancing power source in PowerX's retail electricity services, including its corporate renewable energy service "X-PPA."
This is MIRARTH HOLDINGS Group's first grid-connected energy storage facility, and it also represents the first case in which PowerX has implemented its own products.