渡部 厚志

Single-use plastics (SUPs) have become one of the most pressing environmental, social, and economic challenges facing the world, contributing significantly to the triple planetary crisis of biodiversity, climate change, and pollution (Schmidt et al., 2024). While many governments have developed a range of policy solutions to the problem of SUPs –...

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。...

Using behavioral insights to increase reusable water bottle use Nopa Move’s Smart Bottle Network, with support from the Economic Research Institute for ASEAN and East Asia (ERIA), Institute for Global Environmental Strategies (IGES), and Rare, addressed single-use plastic waste in Ho Chi Minh City’s commuter coffee culture, where disposables...

Using behavioral science to reduce plastic waste on the UP Diliman campus The University of Philippines Diliman (UP Diliman) initiative, led by UP Diliman with support from the Economic Research Institute for ASEAN and East Asia (ERIA), Institute for Global Environmental Strategies (IGES), and Rare, tackled plastic waste generated by a dense campus...

Changing the local reuse economy with behavioral science The Rent Your Cup initiative in Lao PDR, led by Econox with support from Economic Research Institute for ASEAN and East Asia (ERIA), Institute for Global Environmental Strategies (IGES), and Rare, addressed the growing problem of single-use plastic waste driven by expanding café culture and...

Achieving sustainable food systems that align with planetary and human health goals requires assessments of dietary patterns, supply structures, and environmental impacts. This study presents the first comprehensive evaluation of Japan’s food system, using the EAT-Lancet Healthy Reference Diet (EHRD) as a benchmark. First, this study developed an...

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...

国連が2023年9月に発表した「Global Sustainable Development Report 2023 “Times of Crisis, Times of Change: Science for Accelerating Transformations to Sustainable Development”」の日本語翻訳版（暫定仮訳版）。国連事務総長が任命する独立した専門家グループが、世界中のステークホルダーからのインプットをもとにSDGsの進捗を科学的に分析・評価し、持続可能な社会の実現に向けた課題と方策を示すものです。これまでに、2019年及び2023年の国連SDGサミットに合わせて発表されました。 今回の2023年版では...

Single-use plastics (SUPs) are deeply embedded in everyday consumption in rapidly developing Asian cities, yet their widespread use contributes to marine debris, microplastic pollution, and health risks. This study aimed to inform evidence-based policymaking to mitigate marine plastic pollution in the ASEAN+3 region. Stratified random sampling...

The global food system confronts critical challenges, including food insecurity, small-scale producer vulnerability, and environmental degradation. While locally led initiatives emerge as potential solutions, they face obstacles, such as participant bias and scaling limitations. This study analyzes 157 international and 91 Japanese locally led food...