Star Seeds secures first BESS order under Robestec tie-up, supplying Nomuraya’s 2MW/8MWh project

FEATURED NEWS

SMFL Mirai Partners tasks Sun Village with building 11.8MW of solar by December 2027

TUN POWER enters Japan storage market, contracts RE100 Power to develop 2MW/8.1MWh Wakayama asset

Latest

Star Seeds secures first BESS order under Robestec tie-up, supplying Nomuraya’s 2MW/8MWh project
Obton Japan completes rebrand to Voltaiyo, merges with AM unit as it prepares for ICG-backed expansion
SPARK
SMFL Mirai Partners tasks Sun Village with building 11.8MW of solar by December 2027
TUN POWER enters Japan storage market, contracts RE100 Power to develop 2MW/8.1MWh Wakayama asset
Spark plug manufacturer Niterra sets up power unit, starts with on-site PPAs and eyes regional tie-ups
SPARK
Kaihan to acquire 50 low-voltage solar power plants from Sunlife, expects to pay 168,000 yen/kWDC
Kansai EPCO resumes full-scale commercial operation of Oi Unit 3
SPARK
Kitahama Capital Partners acquires 54 solar projects from Trust, eyes resale to Kaihan unit
SPARK
Shizuoka Gas & Power acquires 33.5% of Smart Blue in efforts to accelerate solar rollout
Kansai EPCO delays Takahama 4 post-inspection restart to October 2025 for repairs
SPARK
JFE Engineering, Chubu EPCO, partners commission 112MW Tahara Biomass Power Plant in Aichi
Vena Energy affiliate completes EIA for 50MW onshore wind project in Shimane, eyes July 20208 COD
Weekly EIA update (September 9, 2025): two projects receive METI, one MoE feedback, and more
SPARK
MIRARTH commissions first grid-scale BESS, 2MW/7.4MWh facility under tolling contract with PowerX
Canadian Solar Infrastructure Fund’s 12MW Kasama No. 3 solar plant partially suspended following cable theft
SPARK

Categories

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Wind
Hydro, biomass & geothermal
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storage
Thermal &
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Power
system
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Markets &
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regulation

Roundups

Stay up to date with the latest developments in the Japanese power market with our weekly and monthly summary posts covering the most important areas.

Power business licensees

Monthly tracker of changes in retail, generation, TSO/DSO, and aggregation license holders.

JEPX trading participants

Monthly tracker of changes in wholesale power and non-fossil certificate trading participants.

Balancing market trading participants

Monthly tracker of changes in balancing market participants.

RE100, RE Action & other initiatives

Monthly tracker of changes in members of renewable energy promotion initiatives.

Environmental impact assessment

Weekly tracker of projects' progress through the environmental impact assessment process.

Corporate PPAs

Monthly tracker of corporate PPAs announced in Japan.

FIT/FIP project certifications

Monthly tracker of changes in FIT/FIP project certifications including new certifications, etc.

Nuclear power plants

Monthly tracker of developments related to Japan's nuclear power plants.

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Solar

Obton Japan completes rebrand to Voltaiyo, merges with AM unit as it prepares for ICG-backed expansion
SPARK
SMFL Mirai Partners tasks Sun Village with building 11.8MW of solar by December 2027
Spark plug manufacturer Niterra sets up power unit, starts with on-site PPAs and eyes regional tie-ups
SPARK
Kaihan to acquire 50 low-voltage solar power plants from Sunlife, expects to pay 168,000 yen/kWDC
Kitahama Capital Partners acquires 54 solar projects from Trust, eyes resale to Kaihan unit
SPARK
Shizuoka Gas & Power acquires 33.5% of Smart Blue in efforts to accelerate solar rollout
Canadian Solar Infrastructure Fund’s 12MW Kasama No. 3 solar plant partially suspended following cable theft
SPARK
Shizen Energy scraps 29MW Ofunato solar project amid soaring costs, early FIT-era certification cancellation
SPARK
JYS Holdings raises 4.9B yen for solar, grid-scale BESS via green bonds
Renova plans to invest 100B yen in small-scale solar by FY2030, aims to develop 100MW annually: Nikkei
SPARK

Wind

Vena Energy affiliate completes EIA for 50MW onshore wind project in Shimane, eyes July 20208 COD
Weekly EIA update (September 9, 2025): two projects receive METI, one MoE feedback, and more
SPARK
Invenergy refinances Rusutsu wind farm ahead of FIT-to-FIP switch via loan led by Societe Generale, Mizuho
Weekly EIA update (September 2, 2025): two projects submit methodology, one receives METI approval, and more
SPARK
Mitsubishi confirms offshore wind withdrawal, CEO says unfeasible even at FIP prices double awarded FIT
Mitsubishi to withdraw from all offshore wind projects awarded in Japan’s first auction: Nikkei, NHK
SPARK
Kajima withdraws from Mitsubishi offshore wind projects after failing to agree on construction costs: Nikkei
SPARK
Weekly EIA update (August 26, 2025): three projects receive governor feedback, one gets cancelled
SPARK
Daigas G&P Solution cancels 34.4MW Tomato-Atsuma onshore wind project citing rising costs
Vena expands Asia-Pacific portfolio to 9.7GW including 2.4GW in Japan, plans further growth
SPARK

Hydro, biomass & geothermal

JFE Engineering, Chubu EPCO, partners commission 112MW Tahara Biomass Power Plant in Aichi
Taihei Dengyo to build 2MW woody biomass power plant in Niigata Prefecture, targets 2027 COD
Baseload Capital invests in Furusato Netsuden, eyeing growth in Japan’s geothermal market
Hokuriku EPCO completes Akarajima hydropower plant repowering, expects 700MWh annual generation increase
SPARK
Chubu Electric Power Miraiz launches multi-offtaker PPA for parent’s repowered 2.9MW Keta hydro plant
Salt manufacturer Nihonkaisui to replace on-site coal-fired plant in Kagawa with biomass using METI subsidy
Osaka Gas, Enewill, SMFL Mirai Partners commission 50MW Wakayama Gobo Biomass Power Plant
Chubu EPCO, partners commission 52.7MW biomass plant in Hiroshima, monetize output via VPPAs
Renewable Japan completes first self-developed hydro plant, targets September 2025 COD
Weekly EIA update (July 22, 2025): two projects submit draft assessments, multiple receive METI feedback
SPARK

Battery storage

Star Seeds secures first BESS order under Robestec tie-up, supplying Nomuraya’s 2MW/8MWh project
TUN POWER enters Japan storage market, contracts RE100 Power to develop 2MW/8.1MWh Wakayama asset
MIRARTH commissions first grid-scale BESS, 2MW/7.4MWh facility under tolling contract with PowerX
JYS Holdings raises 4.9B yen for solar, grid-scale BESS via green bonds
PowerX secures BESS orders for Eurus Energy, Tokyo Century-MIRARTH JV extra high-voltage projects
SPARK
Erex to invest in first grid-scale BESS project, eyes Q2 FY2026 COD for 2MW/8MWh Miyazaki facility
Star Seeds breaks ground on first grid-scale BESS, 2MW/8MWh Wakayama facility with January 2026 target COD
SPARK
METI, Tokyo Metropolitan Government open FY2025 grid-scale BESS subsidy schemes for applications
SPARK
4Cs Holdings cancels Gunma BESS site sale at buyer’s request as interconnection costs exceed estimate
SPARK
Shikoku EPCO, Imabari Shipbuilding partner to develop 2MW/4.9MWh dual-use BESS at Ehime shipyard

Thermal & nuclear

Weekly EIA update (June 3, 2025): one project begins process, one receives MoE feedback
SPARK
Weekly EIA update (May 27, 2025): one project submits draft assessment report, two receive METI feedback
SPARK
Chugoku EPCO to issue 40B yen in bonds to fund Shimane 3 safety upgrades required for commissioning
SPARK
Niigata Governor meets mayors as TEPCO awaits consent, prepares for Kashiwazaki-Kariwa restart
SPARK
Weekly EIA update (May 20, 2025): one project begins process, three receive MoE feedback, and more
SPARK
Kyushu EPCO to consider new nuclear reactors under 2035 strategic vision
Nippon Steel plans 2GW LNG-fired project at Kyushu Works to replace aging 1GW Tobata Power Station
ENEOS Power begins EIA for 750MW Ogimachi Natural Gas Power Plant in Kawasaki, eyes 2033 COD
J-POWER to bid under-construction Oma Nuclear Plant in LTDA as early as FY2025: Denki Shimbun
SPARK
Chubu EPCO expands renewable portfolio by 210MW, enters inspection phase of Hamaoka restart in FY2024
SPARK

Power system

Japan to hit lower end of 7th Basic Energy Plan renewables target, solar market to grow in 2030s: Fuji Keizai
SPARK
Japan Jan–June 2025 renewable curtailment hits H1 record, sets fiscal Q1 highs in four areas
TEPCO starts extra high-voltage substation site search to meet future data center load
SPARK
Kansai EPCO audits 14,942 grid connection consultation responses, finds capacity understatements in 37%
Chubu TSO area sees first grid curtailment due to congestion, Japan’s second
SPARK
Shikoku day-ahead price stuck at 0.01 yen/kWh as forest fire forces Chugoku-Shikoku interconnector shutdown
SPARK
Kyushu EPCO finds grid capacity understatements and other errors in 2,100+ preliminary consultations
Preliminary grid connection consultations triple in Q4 2024 amid BESS boom, Tokyo TSO area jumps fivefold
EPCO consortium sole eligible bidder for 2GW Hokkaido-Honshu link, OCCTO says
GE Vernova and Stonepeak eye investing in 2GW Hokkaido-Honshu interconnector project, Nikkei reports

Partnerships & transactions

Ryohin Keikaku, JERA launch 80:20 MUJI ENERGY joint venture, target 13MW of solar in first year
SPARK
Hulic bids for 20% stake in Canadian Solar Infrastructure Fund to expand renewables business
Bain Capital to take Rezil private less than 2 years after IPO, founder and Kansai EPCO to retain stakes
JERA, bp complete offshore wind merger ahead of schedule, launch JERA Nex bp Japan
J-POWER, Hitachi sign MoU to co-develop AI data centers amid growing “watt-bit” collaboration
SPARK
TBS Holdings forms 95:5 JV with UPDATER to develop renewables, source power from third-parties
Erex to invest in Global Engineering, partner on power retail and renewable development
Kaihan targets 130MW of solar, BESS, wind build-to-sell projects, plans EPC and funding tie up with CTIEC
Ryohin Keikaku to form 80:20 JV with JERA, invest 2.1B yen in first year to develop solar projects
Green Energy & Company secures 1.2B yen for BESS projects, aggregation system development

Markets & trading

FY first-round non-FIT renewable NFCs clear above floor for first time, 358GWh sold at ¥0.91/kWh
SPARK
OCCTO awards 47 projects totaling 114.5MWAC in FY2025’s second solar auction, oversubscription persists
OCCTO launches FY2026/FY2027 backup power plant auction, targets 2GW of thermal capacity
SPARK
Enechain to enable day-ahead and intraday trading on its platform in 2026 as JEPX plans to phase out GUI
SPARK
EPRX July 2025 membership updates: 10 companies join, total tops 100
JEPX July 2025 membership updates: power trading membership grows by 2, NFC by 27 members
PRO
EEX to launch fiscal year Japan power futures in October 2025
TOCOM to halve power futures execution, clearing costs between Sep. 2025 and March 2026 to boost liquidity
SPARK
TOCOM to launch Chubu power futures in spring 2026 amid growing needs in Japan’s third largest TSO area
Gunvor starts trading Japan power futures, eyes physical market entry: Bloomberg
SPARK

Policy & regulation

METI to streamline FIT-to-FIP conversions with storage co-location from September 2025
SPARK
METI power licenses and registrations: July 2025 retailer, TSO/DSO, generator, and aggregator changes
PRO
METI, MLIT designate Matsumae and Hiyama as offshore wind Promotion Zones in preparation for Round 4
SPARK
METI considers requiring power retailers to secure kWh in advance to supplement capacity obligation
SPARK
METI power licenses and registrations: June 2025 retailer, TSO/DSO, generator, and aggregator changes
PRO
Hachijojima becomes Japan’s most remote offshore wind zone as METI, MLIT designate Izu Islands sites
SPARK
Kushiro drafts solar ordinance, seeks to regulate 10kW+ development from 2026: Nikkei
SPARK
METI, MLIT issue draft Matsumae, Hiyama offshore wind Promotion Zone designations ahead of next auction
Japan revises environmental impact assessment law, eases rules for repowering projects
SPARK
METI power licenses and registrations: May 2025 retailer, TSO/DSO, generator, and aggregator changes
PRO

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