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					</table><p>Japan’s Organization for Cross-regional Coordination of Transmission Operators (<a href="https://www.occto.or.jp/en/" target="_blank" rel="noopener">OCCTO</a>) has announced the results for the FY 2025 Long-Term Decarbonized Power Source Auction, selecting 28 winners, which included winners for 10 lithium-ion (Li-ion), nine for Li-ion, and two for pumped storage projects for a total energy storage capacity of 1.7 GW.</p>
<p>OCCTO awarded contracts for approximately 7.3 GW of future power capacity, including 4.26 GW of decarbonized energy sources. This included 551 MW of awarded capacity for Li-ion battery projects, 699 MW for non-Li-ion battery projects, and roughly 453 MW for pumped storage projects.</p>
<p>Battery Park 20 GK, <a href="https://chcbess.com/" target="_blank" rel="noopener">CHC Japan</a>, and CS Aomori Hachinohe ESS GK secured the three highest capacities for Li-ion battery projects. They won capacities of 114.01 MW, 112.35 MW, and 90.73 MW, respectively.</p>
<p>Battery Storage Station No. 3 GK, ZEUS GK, and Stonepeak Kingdom Holdings GK were the top three winners for non-Li-ion project capacities, securing 281.62 MW, 149.33 MW, and 141.51 MW, respectively.</p>
<p><a href="https://www.tepco.co.jp/en/rp/index-e.html" target="_blank" rel="noopener">TEPCO Renewable Power</a> and <a href="https://www.hepco.co.jp/english/" target="_blank" rel="noopener">Hokkaido Electric Power</a> secured capacities of 267.55 MW and 185.9 MW, respectively, for pumped storage projects.</p>
<p><a href="https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2026/05/Japan-OCCTO.png"><img loading="lazy" decoding="async" class="aligncenter wp-image-94966 size-full" src="https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2026/05/Japan-OCCTO.png" alt="OCCTO's 4.26 GW Long-term Decarbonized Power Projects: Auction Results" width="825" height="674" srcset="https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2026/05/Japan-OCCTO.png 825w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2026/05/Japan-OCCTO-300x245.png 300w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2026/05/Japan-OCCTO-768x627.png 768w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2026/05/Japan-OCCTO-650x531.png 650w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2026/05/Japan-OCCTO-624x510.png 624w, https://mercomindia.s3.ap-south-1.amazonaws.com/wp-content/uploads/2026/05/Japan-OCCTO-600x490.png 600w" sizes="auto, (max-width: 825px) 100vw, 825px" /></a></p>
<p>This March, OCCTO <a href="https://www.mercomindia.com/japan-awards-79-mw-solar-capacity-at-average-price-of-0-029-kwh" target="_blank" rel="noopener">awarded</a> 79 MW of solar capacity in the 27th solar power auction, the fourth auction held in fiscal year 2025, with a weighted-average winning price of ¥4.61 (~$0.029)/kWh.</p>
<p>In December 2025, OCCTO <a href="https://www.mercomindia.com/japan-awards-75-mw-of-solar-projects-to-27-companies-in-26th-auction" target="_blank" rel="noopener">announced</a> Japan’s 26<sup>th</sup> solar power auction for projects of at least 250 kW, securing 75.4 MW from the original auctioned capacity of 163 MW.</p>
<p>In 2023, Japan <a href="https://www.mercomindia.com/japans-18th-solar-auction-yields-kwh" target="_blank" rel="noopener">announced</a> the results of the 18th utility-scale solar photovoltaic projects auction, allocating 105 MW to 33 successful bidders.</p>
<p>In the same year, OCCTO <a href="https://www.mercomindia.com/lowest-tariff-revealed-japans-69-mw-solar-auction" target="_blank" rel="noopener">concluded</a> the 17th auction for 69.07 MW of grid-connected solar power projects, announcing 55 successful bidders. The total bid capacity in the auction was 110.89 MW.</p>
<p>The global energy transition continued to <a href="https://www.mercomindia.com/global-renewable-capacity-hit-49-of-installed-power-in-2025" target="_blank" rel="noopener">accelerate</a> in 2025, with renewable energy accounting for 49% of total installed power capacity worldwide, according to a recent report by the International Renewable Energy Agency. Renewables accounted for 85.6% of all new power capacity additions during the year, underscoring their dominant role in electricity system expansion. A total of 692 GW capacity was added in 2025, representing a 15.5% year-over-year growth. This pushed total global renewable power capacity to approximately 5,149 GW by the end of the year.</p>


Japan Awards 1.2 GW of Battery Storage Capacity Under Decarbonization Program


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					</table><p>Japan&#8217;s Organization for Cross-regional Coordination of Transmission Operators (<a href="https://www.occto.or.jp/en/" target="_blank" rel="noopener">OCCTO</a>) has awarded 79 MW of solar capacity in the 27<sup>th</sup> solar power auction, the fourth auction held in fiscal year 2025, with a weighted-average winning price of ¥4.61 (~$0.029)/kWh.</p>
<p>The auction was conducted for Feed-in Premium (FIP) solar power generation facilities with a capacity of 250 kW or higher under Japan’s renewable energy support framework. The auction had set a price cap of ¥8.68 (~$0.055)/kWh.</p>
<p>Eleven projects were selected through the auction process. The lowest successful bid price was ¥0.00/kWh, while the highest was ¥6.49 (~$0.041)/kWh.</p>
<p>According to OCCTO, 38 business plans were submitted for eligibility review prior to the bidding process, representing a combined generation capacity of 198.08 MW</p>
<p>Out of these, 37 applicants were notified of their eligibility to participate in the auction, representing a total capacity of 196 MW. A total of 23 bids were eventually submitted, covering a combined capacity of 162 MW. The weighted average bid price submitted by participants was ¥6.49 (~$0.041)/kWh.</p>
<p>In December 2025, OCCTO <a href="https://www.mercomindia.com/japan-awards-75-mw-of-solar-projects-to-27-companies-in-26th-auction" target="_blank" rel="noopener">announced</a> Japan’s 26<sup>th</sup> solar power auction for projects of at least 250 kW, securing 75.4 MW from the original auctioned capacity of 163 MW.</p>
<p>The FIP program was introduced in 2022 to promote renewable energy by adding a premium to the market price of power generated from renewables.</p>
<p>Global solar installations <a href="https://www.mercomindia.com/global-solar-installations-hit-a-record-597-mw-in-2024-report" target="_blank" rel="noopener">hit</a> a record high of 597 GW in 2024, a 33% increase year-over-year from 2023, according SolarPower Europe. Japan accounted for 1% of the total installations during the year.</p>
<p>In 2023, the government of Japan <a href="https://www.mercomindia.com/japans-18th-solar-auction-yields-kwh" target="_blank" rel="noopener">announced</a> the results of the 18th utility-scale solar photovoltaic projects auction, allocating 105 MW to 33 successful bidders.</p>
<p>In the same year, OCCTO <a href="https://www.mercomindia.com/lowest-tariff-revealed-japans-69-mw-solar-auction" target="_blank" rel="noopener">concluded</a> the 17th auction for 69.07 MW of grid-connected solar power projects, announcing 55 successful bidders. The total bid capacity in the auction was 110.89 MW.</p>


Japan Awards 79 MW Solar Capacity at Average Price of $0.029/kWh

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