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Methane is a potent, short-lived climate pollutant responsible for nearly 0.5°C of global temperature rise. Though it remains in the atmosphere for about 12 years, its climate impact is 86 times stronger than carbon dioxide over 20 years, making methane mitigation one of the most effective strategies for tackling climate change. The waste sector...

東南アジア地域における急速な都市化と消費拡大に伴い、プラスチック廃棄物の発生量が急増し、プラスチック汚染が特に深刻な課題となっている。ASEAN諸国では、使い捨てプラスチックの禁止、拡大生産者責任（EPR）制度、普及啓発キャンペーンなど、さまざまな対策が進められている。しかし、これらの対策だけでは、根強く定着した消費行動を変えるのは難しい。 利用制限や普及啓発だけで十分な効果が得られないような課題に対し、行動科学は有効な補完的アプローチとなる。Behaviour-Centred （行動に関する理解に基づく、行動に焦点を当てた）アプローチを取り入れることで、単なる情報提供や経済的インセンティブに頼るのではなく、「意図と行動のギャップ」を埋め、持続可能な行動変容を促すことができる。...

Plastic pollution is a growing challenge in Southeast Asia, where rapid urbanisation and rising consumption are driving sharp increases in plastic waste. While traditional regulations such as plastic bans and information campaigns are important, they often fail to shift deeply ingrained consumption and waste management habits on their own. This new...

From "Islands of Excellence" to a "Sea of Change": How ASEAN's Secondary Cities are Localising the SDGs in the region As the ASEAN region rapidly urbanises, the focus often falls on its mega-cities. However, a quiet transformation is underway in the region’s secondary cities -- the agile urban centres that are proving to be fertile ground for...

This report provides a baseline assessment of Cambodia’s informal waste sector, with a focus on Phnom Penh and Battambang. Informal waste workers, including street pickers, door-to-door collectors, pickers at landfills and junkshop operators, play a critical yet undervalued role in the country’s waste management system. They are responsible for a...

The 'National Workshop on Enhancing the Capacity of the Informal Waste Recycling Sector Towards a Zero Waste Society' concluded with a plenary discussion on government support for informal sector integration, acknowledging the existing technical support provided by the Ministry of Environment and the potential for collaboration with the Ministry of...

The Methane Reduction Roadmap for Cambodia sets out a strategic plan to cut methane emissions and align with global climate goals, including the Global Methane Pledge and Cambodia’s Long-Term Strategy for Carbon Neutrality. Developed by the Ministry of Environment with support from IGES and CCAC, the roadmap targets three major sectors— agriculture...

韓国原子力協会に招待され、2024年12月に韓国慶州市のHwabaek国際コンベンションセンターにて開催されたGlobal Nuclear Energy & Safety Confex (NES 2024)に出席した。 韓国の原発政策は、2022年に発足した尹錫悦政権が文在寅前政権の脱原発から180度方針転換し、国内の新増設と国外への原発輸出拡大へと舵を切った。 この会議には韓国内外の原子力産業から75社、160の展示ブース、約5,000名（主催者発表）が参加した。

Hotta contributed as a panleist of the Side Event for INC-5 Plastic Pollution organized by Korean Environment Institute organized in November 2024 in Busan, Republic of Korea. Objectives of this roundtable include: 1) Explore policy approaches to plastic pollution: Discuss and evaluate various policy strategies to combat plastic pollution at...

IGES Joint Crediting Mechanism (JCM) Database provides detailed information on the JCM methodologies, projects, and JCM feasibility studies to be utilized for research and development of JCM project. The JCM is being implemented under bilateral cooperation between Japan and 29 partner countries: Mongolia, Bangladesh, Ethiopia, Kenya, Maldives, Viet...