




This project is a collaborative effort aimed at cleaning up streets, irrigation waterways, rivers, and beaches, addressing the accumulation of marine debris in the Seto Inland Sea. Spearheaded by the Okayama ESD Promotion Commission, a multi-stakeholder network with its secretariat in the Okayama City Office, this project compiles activities conducted by different stakeholders. The commission has provided subsidies or supported citizens’ cleanup activities with learning sessions at Kominkans (Community Learning Centres, or CLCs), hosted forums where various stakeholders can present and discuss their efforts, and held exhibitions to raise awareness of marine debris, coordinating with other municipalities. By implementing a whole-community approach with cross-sectoral partnerships, this project has not only contributed to the removal of litter but also encouraged citizens to take action toward the protection of the blue environment.
Okayama faces the Seto Inland Sea, designated as a national park, and is home to numerous rivers and irrigation waterways. As a result, water environmental issues are a familiar concern for its residents. Approximately 4,500 tons of litter end up in the sea each year, with 66% flowing in from rivers and waterways in the prefectures adjacent to the sea. As such, reducing inland litter is a more efficient way to maintain Okayama’s bodies of water . In response to the growing number of citizens’ cleanup activities, the Okayama ESD Promotion Commission launched this project in line with the national government’s vision to combat marine debris.
This project provides citizens with learning opportunities through litter pickup experiences. They learn about the relevance of environmental conservation, the marine litter problem and its impact on communities, and the city’s countermeasures. It also encourages them to change their environmental behavior and take action for litter reduction and marine protection. The following learning aspects are incorporated into this project: Table. Learning Aspects Understanding the issue Awareness creation through experiences Making behavioral changes and taking action toward solutions
Objectives
AOP for ESD
Example Activities
Aspect 1
Understand the marine debris problem
Learners Participation; Community Engagement; Problem-based and Real-world Issues; Empathy
Advocacy through available instruments and exhibitions; learning events
Aspect 2
Acquire knowledge on sustainable management of blue environment and reduction of marine litter
Learners Participation; Community Engagement; Collaboration
Forums hosted by the Okayama ESD Promotion Commission; litter cleanup events with learning sessions
Aspect 3
Take further protective action toward the environment
Learners Participation; Collaboration
Individual and organizational behavioral changes; engaging previous participant in organizing new cleanup groups and events
At the G20 Summit held in Japan in 2019, the “G20 Implementation Framework for Actions on Marine Plastic Litter” was endorsed by the members, and the Japanese government introduced the “National Action Plan for Marine Plastic Litter.” In response to the growing momentum at the national and global levels and the increasing number of activities by local stakeholders, the Okayama ESD Promotion Commission established the Expert Committee on SDGs Project on Marine Environment and initiated this project in 2021. Additionally, Okayama City developed the “Okayama City Action Plan for Marine Plastic Waste” in 2022, which incorporated collaboration with the Expert Committee and the implementation of this project.
The Okayama ESD Promotion Commission has expanded this project beyond the local area. At the forums, the Commission invites NPOs, schools, and businesses from outside the area to share their experiences and join the discussions. Additionally, Okayama City, in cooperation with the existing network of neighboring local municipalities, holds exhibitions to showcase the efforts of each municipality. They conduct litter pickup activities in each area simultaneously to scale up the results of this project.
Evaluation method includes questionnaires and essay writing.
The problem of marine debris is now well known among citizens at all levels, thanks to news coverage and publicity by the city and the network. Citizens’ cleanup activities have become more stable and sustainable with the city’s subsidies or sponsorship. Additionally, positive actions and new cooperative relationships among participants have emerged. For example, one environmental organization formed a new committee of students, who had previously been participants and learners, to take the lead in litter pickup activities. One local media outlet started a marine litter reduction campaign, actively covering related stories, and organized large-scale marine litter cleanup activities and workshops in cooperation with other stakeholders.
Actions to Take: Cooperation among various sectors is essential to address common regional challenges. In 2005, Okayama City created a network of various stakeholders, the Okayama ESD Promotion Commission, to develop human resources for building a sustainable society. The Commission started with 19 member organizations and has now grown to include about 380 organizations, comprising citizens’ groups, businesses, media, educational institutions, Kominkans, and municipality offices. The Okayama City Office, acting as a secretariat, has provided both human and financial support to the Commission. The Commission conducts a series of ESD and SDGs activities under the name “The Okayama ESD Project,” including this marine environment project. Additionally, Okayama City promotes this project in cooperation with neighboring municipalities, particularly through the network “Okayama Core Regional Urban Area,” which was established by 13 municipalities in 2017 to collaborate on regional revitalization.
About “The Okayama ESD Project” in Okayama City’s website: https://www.city.okayama.jp/kurashi/category/1-9-9-8-0-0-0-0-0-0.html Okayama City Office’s website solely dedicated to SDGs and ESD (in Japanese; for English and different languages, please choose one at the auto-translation box): https://www.city.okayama.jp/sdgs-esd/category/17-4-2-0-0-0-0-0-0-0.html Okayama City Office’s website solely dedicated to marine litter problem (in Japanese; for English and different languages, please choose one at the auto-translation box): https://www.city.okayama.jp/harmonia/category/23-4-0-0-0-0-0-0-0-0.html [INFOGRAPHICS] [REFERENCES] [IMAGES]
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Citizens Learning at Litter Pickup Event in Okayama

Citizens Separating Garbage at Litter Pickup Event in Okayama

City Mayor (second from left) Joining Litter Pickup Event in Okayama
United Nations University
Institute for the Advanced Study of Sustainability
(UNU-IAS)
5‒53‒70 Jingumae
Shibuya-ku, Tokyo 150-8925
Japan
Tel: +81 3 5467 1212
Fax: +81 3 3499 2828
United Nations University
Institute for the Advanced Study of Sustainability
(UNU-IAS)
5‒53‒70 Jingumae
Shibuya-ku, Tokyo 150-8925
Japan
Tel: +81 3 5467 1212
Fax: +81 3 3499 2828