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Survey of scattered garbage on rivers and urban areas
Last updated on December 19, 2024.
What is the problem of garbage scattered on rivers and urban streets?
Garbage littered on the street, etc., or garbage that has been properly dumped at a collection point, if scattering prevention measures are insufficient, it will be thrown away by wind and rain and become scattered garbage. Scattering garbage flows into the ocean via rivers and causes marine litter.
In particular, plastic garbage can cause death when sea turtles and seabirds eat incorrectly with food or get entangled with the body. In addition, deterioration and fragmentation due to ultraviolet rays become microplastics, and there are concerns about marine pollution and the impact on ecosystems (marine plastic problems, microplastics).
In order to reduce the outflow of garbage into the ocean, measures on rivers and land are important. Therefore, a survey was conducted to understand the actual situation of scattered garbage on rivers and urban streets.
Garbage scattered on the riverside
Survey method
| Name of survey | Survey method | Survey site |
|---|---|---|
| River waste survey | Investigate garbage collected by waterside protection society (Note 1) by river cleaning in middle reaches of four rivers in the city | Itachi River |
Urban street garbage survey | Investigate garbage collected by street cleaning around the station | Around Kannai Station |
Note 1: It is a volunteer organization that cleans rivers and waterside facilities. In the river garbage survey, the following four organizations cooperated.
- Itagawa (Tenjinbashi-Shimbashi) Waterside Protection Association
- Izumi River Moguri Bridge Waterside Protection Association
- Hodogaya-juku Matsunamiki Promenade Waterside Protection Association (Igawa)
- Samurai River Waterside Protection Association
Specifically, please see Yokohama-shi HP "waterside protection society".
Results of the survey
| Name of survey | Overview of Results |
|---|---|
| River waste survey | In the 2022 survey, plastics accounted for about 40% of the waste. |
| Urban street garbage survey | In the 2023 survey, metals accounted for about 20% of the waste, and about half of it was aluminum cans. |
Figure 1 Results of Roadside Waste Composition Survey in FY2023 (Composition Ratio)
Figure 2 Results of Roadside Waste Composition Survey in FY2023 (Number)
2023 street garbage survey results (Excel: 18KB)
2022 Wetchigawa Survey Results (PDF: 324KB)
Details of the survey results (from FY2018 to FY2020) (PDF: 1,060KB)
Reference link
What is the plastic problem?
Countermeasures against marine waste including plastic (drifting, drifting, seabed waste) (Ministry of the Environment) (outside site)
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Inquiries to this page
Policy Coordination Division, Policy Coordination Division, Resources and Waste Recycling Bureau Policy Coordination Department
Phone: 045-671-4565
Phone: 045-671-4565
Fax: 045-550-4239
E-Mail address [email protected]
Page ID: 651-415-964
