2026年4月8日、国際環境NGOの350.org Japanとグリーンピース・ジャパンが、電源開発株式会社(J-POWER)の加藤英彰代表取締役社長に対し、長崎県西海市で計画されている「GENESIS松島」の中止を求める要望書を提出しました。
この要望は、同計画について以前から「見直す」「延期せざるを得ない」と述べていた加藤氏が、今年4月1日に新社長に就任したことを受けて行われたものです。
要望書の内容
要望書は、J-POWERに対し、石炭火力増設という「誤った選択」を撤回し、自立したエネルギー体系の構築へ舵を切るよう決断を迫る内容となっています。
計画の背景と主な懸念点
「GENESIS松島」は、1981年の運転開始から45年が経過し、現在は休止中の松島火力発電所2号機に、約10万kW相当の石炭ガス化発電設備を付加する計画です。しかし、この計画には以下の課題が指摘されています。
- 不十分な排出削減: 導入予定の石炭ガス化技術では、CO2排出量の削減効果はわずかであり、世界の「脱石炭」の流れに逆行していると批判されています。
- 経済性とコスト: 加藤社長自身も「オンスケジュールで進めるとコストがかなり割高になる」と言及しており、将来的なCCUS(CO2回収・貯留)への対応を含めると、さらに経済合理性が不透明になります。
- エネルギー安全保障: 海外からの燃料輸入に依存し続ける石炭火力は、昨今の緊迫した国際情勢において構造的な脆弱性を抱えています。
持続可能な地域社会のために
NGO側は、パリ協定の1.5℃目標達成のためには、日本のような先進国は2030年までに石炭火力から脱却すべきだと訴えています。また、地元住民からも気候危機による酷暑や大雨への不安の声が上がっており、環境負荷の高い石炭火力の延命ではなく、「再生可能エネルギーへの公正な移行」による地域経済の発展と雇用確保を求めています。
より持続可能な選択肢の検討を
GENESIS松島をめぐる議論は、単なる一つの発電所計画にとどまりません。企業にとっては投資判断と競争力、自治体にとっては地域経済と政策の方向性、そして住民にとっては暮らしの安全と将来に関わる問題です。いま求められているのは、それぞれの立場からリスクと機会を見極め、より持続可能な選択肢を検討していくことではないでしょうか。
350.org Japanとグリーンピース・ジャパンが提出した要望書は以下リンク先からご覧ください。
Environmental NGOs Call on J-Power President to Cancel the GENESIS Matsushima Project
On April 8th, 2026, the international environmental NGOs 350.org Japan and Greenpeace Japan jointly issued a statement calling for the cancellation of the GENESIS Matsushima Project in Saikai City, Nagasaki Prefecture. The Project, which this platform has consistently covered, plans to expand capacity of the coal-fired power plant, and is now again at a critical crossroads.
The GENESIS Matsushima Project is a plan to “upcycle” the existing aged power unit at the Matsushima Thermal Power Plant by adding a gasification unit (Integrated Gasification Combined Cycle,IGCC). While it may appear as an effort toward efficiency and decarbonization, the actual CO2 emission reductions are limited and the fact that this Project allows for the continued use of coal-fired power generation over the long term is a major concern. Furthermore, during the last two phases of the environmental assessment, concerns regarding air pollutant emissions and impact on climate were pointed out and numerous opinions from the public were submitted.
On the other hand, the power utilities and local government cannot ignore the associated costs and future business risks. The Project has already been delayed, which has contributed to the uncertainties of additional investment. If the Project attempts to implement technologies such as Carbon Capture, Utilization and Storage (CCUS), in addition to IGCC, costs can be expected to increase even more. As international rules and the market environment surrounding decarbonization change rapidly, the competitiveness of such investments should be thoroughly considered.
Internationally, phasing out coal-fired power is already a major trend. More than 180 countries, regions and companies have joined the Powering Past Coal Alliance (PPCA), and the transition to renewable energy is progressing. These kinds of movements are beginning to impact corporate financing, supply chains and local economies.
Masayoshi Iyoda of 350.org Japan points out that developed countries like Japan are required to phase out coal-fired power by 2030, emphasizing the necessity of transitioning to renewable energy. Similarly, Ikumi Toyota of Greenpeace Japan also describes the dependence on fossil fuels as an additional energy security risk.
The statement also highlights the voices of local residents. A resident of Nagasaki City stated, “While we already feel climate change impacting our lives, I feel strong anxiety regarding plans to extend the lifespan of coal-fired power,” and called for a transition to sustainable energy.
Furthermore, they appealed that changing direction is necessary now to ensure avoiding leaving any burden on future generations.
A local perspective is also crucial. While the Matsushima Thermal Power Plant has supported regional employment and economy, energy resources must be reassessed for securing regional sustainability for the future. The introduction of renewable energy and the development of related businesses have potential to create new jobs and investment in the region.
The issues surrounding the GENESIS Matsushima are not merely about a single power plant project. While the company considers investment and competitiveness, the local government considers economic and policy direction, and residents think about their livelihoods and future. Now, all parties need to evaluate the risks and opportunities from their perspective and consider more sustainable options.
