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本レポートは、世界平均気温の上昇を産業革命前と比べて１.5℃以内に抑えるという目標の達成に向けて、2050年までにカーボンニュートラルを実現するだけではなく、累積排出量をできる限り小さくする観点から、日本国内で早期に大幅な温室効果ガス（GHG）排出量削減を果たす可能性を検討し、その実現のためのアクションプランをまとめたものである。 2024年4月2日更新 謝辞の追記、出典の追記、誤記の修正を行いました。 企業の方向けに使いやすく再構成した「 1.5℃ロードマップ - 脱炭素でチャンスをつかむ。未来をつくる。 」もご活用ください。

This report examines the feasibility of Japan not only achieving carbon neutrality by 2050, but also making significant reductions in greenhouse gas (GHG) emissions, so as to make its cumulative emissions as small as possible, thereby contributing to the global goal of limiting the average temperature increase to below 1.5°C compared to the pre...

農地において支柱を立てて上部空間に太陽光発電設備を設置し、下部空間では営農を継続しながら発電を行う営農型太陽光発電（ソーラーシェアリング）は、再生可能エネルギー導入量の拡大が見込めること、農業者の収入拡大による農業経営の改善や6次産業化の推進も期待できることから、政府として推進する方針が掲げられ、様々な制度で導入促進が図られている。 例えば、再生可能エネルギーの導入促進のために固定価格買取制度が導入されているが、営農型太陽光発電と野立太陽光発電で買取価格が区別されていない。しかしながら、両者は費用構造や事業リスクが異なり、導入によってもたらされる便益も異なることから、その性質に則して営農型太陽光発電の推進のための施策が導入されることが望ましい。...

This IGES Issue Brief is an update on policy developments related to sustainable finance in Japan between May 2022 and August 2022. The Expert Panel on Sustainable Finance under the Financial Services Agency (FSA) published the ‘Second Report by the Expert Panel on Sustainable Finance,’ outlining the progress of developments over the past year and...

This paper examines the effects of financial incentives, particularly electricity prices, on residential solar photovoltaic system installations. We shed light on the importance of a factor that has been largely overlooked in the literature on the adoption behavior of low-carbon building technologies: the distinction between retrofit and new-build...

This IGES Issue Brief is an update of policy developments related to sustainable finance in Japan between February 2022 and April 2022. In this period, policy work pertaining to sustainability-related disclosure continued on multiple fronts. At the Financial Services Agency (FSA), the ‘Working Group on Corporate Disclosure of the Financial System...

This IGES Issue Brief is an update of policy developments related to sustainable finance in Japan between October 2021 and January 2022. The highlights of developments on sustainable finance in this period was work pertaining to sustainability-related disclosure. At the Financial Services Agency (FSA), the ‘Disclosure Working Group’ continued with...

The Paris Agreement sets the goal to limit the global warming to well below 2 °C and preferably 1.5 °C. The recent IPCC report warned that 1.5 °C-warming may occur much earlier than expected. To meet the 1.5 °C target, global emissions of greenhouse gases (GHGs) should be net zero by 2050 or earlier. Increasing number of countries, local...

This IGES Issue Brief is an update of policy developments related to sustainable finance in Japan between June 2021 and September 2021 . SUMMARY Notably for this period, the Expert Panel on Sustainable Finance under the Financial Services Agency (FSA) issued ‘The Report by the Expert Panel on Sustainable Finance’ in mid-June. Building on the...

This IGES Issue Brief is an update of policy developments related to sustainable finance in Japan between March 2021 and May 2021. March to May was a busy period for Japan’s sustainable finance policy, as several key outputs likely to shape Japan’s sustainable finance were issued. The Ministry of Economy, Trade and Industry (METI), the Financial...