TEPCO Offshore Wind Strategy, Mitsubishi’s 1.7 GW Exit, $17 M Floating Wind Budget, and 2 Key Agreements (2021 to 2026)

Offshore Wind Project Viability, TEPCO Navigates Mitsubishi’s 1.7 GW Exit

In 2025, Japan’s offshore wind industry faced a significant market correction where rising costs and economic pressures forced a major developer to withdraw, creating both a critical risk and a strategic opening for TEPCO. Prior to 2025, the sector was characterized by widespread optimism, aligning with Japan’s national target of 10 GW by 2030. However, the commercial reality shifted on August 27, 2025, when Mitsubishi Corporation cancelled its involvement in three major offshore wind projects totaling 1.7 GW, including a key site near Choshi, citing economic non-viability. This event validated the severe cost pressures facing the industry and reshaped the competitive environment for remaining players like TEPCO.

Mitsubishi’s 2025 Project Cancellations

The withdrawal of Mitsubishi Corporation from its portfolio of fixed-bottom offshore wind projects serves as the single most important market signal of 2025, confirming that project economics had become untenable under the existing cost structures. The company’s decision was a direct response to global supply chain disruptions and inflationary pressures that made the projects unprofitable, a challenge that affects all developers in the market. This high-profile exit creates a vacuum in project development, particularly in the promotional sea area off Choshi, and puts pressure on the Japanese government to re-evaluate its auction and support mechanisms to ensure its national offshore wind targets remain achievable.

TEPCO’s Dual-Technology Strategy

In response to this turbulent market, TEPCO maintained its dual-technology strategy, advancing both established fixed-bottom and next-generation floating wind projects. The company continued to focus on enhancing the price and non-price competitiveness of its existing fixed-bottom commercial station off Choshi. Concurrently, through its subsidiary Flotation Energy, TEPCO intensified its efforts to develop large-scale floating offshore wind farms. This approach allows TEPCO to de-risk its portfolio by not relying on a single technology type while positioning it to potentially acquire sites abandoned by competitors if it can engineer a more resilient cost model.

TEPCO Divests Morecambe Project, Reallocating Capital to Japan (2025)

In 2025, TEPCO executed a strategic capital reallocation by divesting its UK-based Morecambe offshore wind project, a move designed to concentrate financial resources on the developing, high-potential Japanese domestic market. This decision reflects a broader trend among integrated energy companies, such as Shell, to rationalize their global portfolios and focus on core regions where they have a competitive advantage. For TEPCO, the sale unlocks capital to deploy in a home market now supported by new favorable legislation and government de-risking initiatives.

The Morecambe Divestment to CIP

The key transaction was the sale of the Morecambe offshore wind project to Copenhagen Infrastructure Partners (CIP), completed on February 26, 2025. TEPCO’s subsidiary, Flotation Energy, along with its partner COBRA Group, finalized the divestment, marking TEPCO’s exit from that specific UK development. This move is less a retreat from offshore wind and more a calculated pivot, enabling the company to recycle capital into Japanese projects that align more closely with its long-term domestic energy strategy and benefit directly from national policy support.

Green Innovation Fund as a De-risking Tool

The decision to refocus on Japan is reinforced by significant government support aimed at de-risking new technologies. TEPCO is a key participant in projects backed by NEDO’s Green Innovation Fund (GIF). Notably, the FLOWRA project, which focuses on creating design standards for floating offshore wind, has an allocated budget of approximately 4 billion JPY for the 2025–2030 period. This government investment in foundational R&D and standardization is critical for reducing the costs and uncertainties associated with the floating wind technologies central to TEPCO’s future plans.

Table: TEPCO 2025 Strategic Investment and Market Reshaping Events

2 Key Agreements, TEPCO’s Focus on Offtake and Supply Chain

TEPCO’s 2025 partnerships reveal a strategic focus on securing local demand and supporting the development of a domestic supply chain, two critical enablers for the long-term viability of its large-scale offshore wind projects. Rather than just focusing on generation, these alliances are designed to build the foundational ecosystem needed for success. The company is actively working to create captive markets for its green electricity while relying on broader public-private partnerships to ensure the necessary industrial base is in place.

Yokohama Port Green Energy MOU

On January 24, 2025, TEPCO Power Grid signed a Memorandum of Understanding (MOU) with the City of Yokohama. This agreement’s purpose is to explore methods for supplying green power from offshore wind to the Port of Yokohama, supporting its decarbonization plan. This partnership is significant as it creates a potential offtake agreement, securing a dedicated buyer for future generated power and helping to de-risk the massive capital investment required for offshore wind farms.

Siemens Gamesa and METI Supply Chain Alliance

While not a direct partner, TEPCO stands to benefit significantly from the cooperation framework established between Japan’s Ministry of Economy, Trade and Industry (METI) and Siemens Gamesa on June 24, 2025. This alliance aims to build out the domestic offshore wind turbine supply chain. A robust local supply chain is essential for reducing project costs, minimizing logistical risks, and improving the overall economics of projects, directly addressing the core issues that led to Mitsubishi’s withdrawal.

Table: TEPCO 2025 Strategic Partnerships and Ecosystem Development

Japan vs. UK, TEPCO’s Geographic Pivot to Domestic Market

TEPCO’s 2025 offshore wind strategy is defined by a distinct geographic pivot away from international assets to consolidate efforts within Japan, a move spurred by new legislation opening its Exclusive Economic Zone (EEZ) for development. The sale of its UK asset was not an isolated financial transaction but a clear signal of its intent to prioritize the Japanese domestic market, where it can leverage its incumbent status, deep regulatory knowledge, and alignment with national energy security goals.

Divestment from the UK Market

The sale of the Morecambe project stake in the UK marked the key tactical move in TEPCO’s geographic realignment. While the UK has a mature offshore wind market, it is also highly competitive. By exiting, TEPCO avoids competing in a crowded field and redirects its focus to Japan, a market with enormous growth potential but also unique challenges, such as deep coastal waters and seismic risks, where TEPCO’s domestic engineering expertise provides a competitive advantage.

The ‘EEZ Law’ Catalyst for Japan

The catalyst for this domestic focus was the passage of the ‘EEZ Law’ on June 3, 2025. This legislation amends the Marine Renewable Energy Act to permit offshore wind development in Japan’s vast Exclusive Economic Zones for the first time. This regulatory change dramatically expands the available area for projects, particularly for the floating wind technology that is central to TEPCO’s long-term strategy. It unlocks Japan’s deep-water potential and provides the geographic runway needed to meet the government’s ambitious 30-45 GW offshore wind target by 2040.

Floating Wind Commercialization, TEPCO Pursues 15+ MW Turbines

While TEPCO continues to operate mature fixed-bottom technology, its 2025 strategic focus shifted decisively toward accelerating the commercial readiness of floating wind, aligning with industry demonstrations of next-generation 15+ MW turbines. This technological pivot is not a choice but a necessity for Japan, as the country’s deep coastal waters make fixed-bottom turbines unfeasible for a majority of its potential offshore wind sites. This focus is similar to strategies seen at other deep-water specialists like Chevron.

From Fixed-Bottom to Floating Wind Focus

In the period before 2025, TEPCO’s commercial activity centered on its fixed-bottom demonstrator at Choshi and its involvement in the Fukushima FORWARD floating wind demonstration project. In 2025, while the Choshi site remains important for operational learning, the strategic emphasis and future investment narrative shifted heavily toward commercializing floating solutions. Through its subsidiary Flotation Energy, TEPCO is now involved in efforts to build the world’s largest floating wind farm, signaling a clear transition from R&D to commercial-scale ambition.

RECORD 15 and the 15+ MW Turbine Trend

TEPCO’s strategy is synchronized with a critical industry-wide technology trend: the move toward larger and more powerful turbines. The launch of the RECORD 15 joint industry project on June 23, 2025, aims to demonstrate a turbine class exceeding 15 MW on a floating platform. The successful deployment of these larger turbines is essential for improving the levelized cost of energy (LCOE) for floating wind projects, making them economically competitive and bankable. TEPCO’s future projects are contingent on the successful commercialization of this next-generation hardware.

SWOT Analysis, TEPCO’s Offshore Wind Execution Risks and Opportunities

The SWOT analysis reveals TEPCO’s strength in its domestic market knowledge and dual-technology strategy, but it also highlights a significant threat from the market-wide economic pressures that forced a major competitor to exit. The key change in 2025 was the validation of this external threat, which simultaneously created a strategic opportunity for TEPCO to consolidate its position if it can successfully manage costs. The passage of the new EEZ law presents the most significant opportunity for long-term expansion.

• Strengths: Deep experience with Japan’s grid and regulatory environment, operational data from Choshi and Fukushima projects, and a balanced portfolio with both fixed and floating technologies.
• Weaknesses: Exposure to the same high domestic project costs and supply chain bottlenecks that affected Mitsubishi, and a reliance on government-led initiatives to de-risk new technologies.
• Opportunities: Potential to bid on re-tendered project sites abandoned by Mitsubishi, a vast new territory for development opened by the EEZ law, and strong government support through the Green Innovation Fund.
• Threats: Sustained cost inflation and supply chain volatility making projects economically unviable, and competition from other domestic utilities and international players also targeting the Japanese market.

Table: SWOT Analysis for TEPCO’s Offshore Wind Strategy (2021-2025)

TEPCO 2026 Outlook, Watch Bids on Ex-Mitsubishi Sites

For 2026, the critical indicator to watch is whether TEPCO participates in the re-tendering process for the 1.7 GW of offshore wind sites abandoned by Mitsubishi Corporation. A decision to bid would signal strong confidence in a superior cost model and an ability to succeed where a major rival failed. Conversely, inaction could suggest that the economic challenges are systemic, forcing TEPCO to pivot even more aggressively toward government-supported floating wind projects or to lobby for more favorable auction terms.

• If TEPCO bids on the former Mitsubishi sites, watch for the announcement of new joint venture partners who can bring down costs, or evidence of a vertically integrated supply chain strategy that provides a competitive edge.
• If TEPCO does not bid, watch for accelerated timelines and investment announcements related to its floating wind projects under the NEDO Green Innovation Fund, indicating a strategic retreat from the hyper-competitive fixed-bottom auction market.
• Progress on the Yokohama Port partnership will also be a key signal. A firm power purchase agreement from this MOU would provide the revenue certainty needed to support a positive investment decision on a new large-scale project.

The questions your competitors are already asking

This report covers one angle of TEPCO’s offshore wind trajectory. The questions that matter most depend on your work.

• Bids for former Mitsubishi offshore wind sites Japan
• Floating wind cost reduction progress Japan
• Japan offshore wind auction rule changes
• Japanese offshore wind supply chain new factories

This report does not answer these. Enki Brief Pro does.

Your question, your angle, your framework. SWOT, PESTL, scenario modelling. The same niche depth, built around the decision your work actually depends on.

Run your first brief in Enki Brief Pro