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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。

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...

IGES's GHG emissions database aims to compile the latest information on GHG and CO2 emissions, as reported annually by UNFCCC Annex I countries. The data covers the period from from 1990 up to two years before the submission date of the reports. This database also provides information on target compliance, in order to compare historical emission...

The List of Grid Emission Factors aims to provide information to be utilized for research and analysis regarding emissions from electricity generation. A "grid emission factor" refers to a CO2 emission factor (tCO2/MWh) which will be associated with each unit of electricity provided by an electricity system. It is a parameter to determine the...

IGES's CDM Programme of Activities (PoA) Database aims at providing comprehensive and organised information on PoAs in an easy-to-understand way. It also compiles information on Component Project Activities (CPAs). The database allows users to search for specific data on each project in the pipeline more easily and enables them to use relevant...

This paper aims to highlight the benefits that robust and self-sustained transparency systems can bring to governments, beyond fulfilling current and future reporting requirements under the United Nations Framework Convention on Climate Change (the Convention) and the Paris Agreement. It also aims to reach climate change policymakers and...

Focusing on four major ASEAN member states, including Indonesia, Viet Nam, Thailand and the Philippines, this paper reviews the current status, and identifies the gaps and prospects for achieving a high penetration of renewables for energy transition in ASEAN. These four countries have been leading renewable policies in this region and have...

This chapter explores the interest in hydrogen adoption across Asian countries for achieving net-zero goals, with a particular focus on Japan's prominent role. While Japan has taken strides in hydrogen initiatives, the extent to which its strategy aligns with ambitious climate targets remains uncertain. The chapter emphasises the importance of...

Transitioning to the Enhanced Transparency Framework (ETF) under the Paris Agreement (PA) from the current measurement, reporting and verification (MRV) arrangements under the United Nations Framework Convention on Climate Change (UNFCCC) requires developing countries to enhance their national reporting systems in a sustainable way. There are...

　 2020 年 10 月、当時の菅総理が「 2050 年カーボンニュートラル、脱炭素社会の実現」を宣言してから今日に至るまで（ 2023 年 3 月 31 日時点）、東京都・京都市・横浜市を始めとする 934 自治体（ 46 都道府県、 531 市、 21 特別区、 290 町、 46 村）が「 2050 年までに二酸化炭素排出実質ゼロ」を表明しており、係る自治体の総人口は、約 1 億 2,577 万人にのぼる。今後、自治体による地域特性に配慮した再エネ戦略づくりの更なる活性化が見込まれ、再エネポテンシャルの正確な把握が課題となる。本稿は神奈川県三浦郡葉山町を対象に、建築物外周線データ分析に基づき、当該行政区域における屋上設置型太陽光発電設備の導入ポテンシャルについて試算した。試算では...