Waste Management in the City of Yokohama

A. Case Study Overview

1. Activity/ Project Title:
Waste Management in the City of Yokohama
2. Themes:
3. Summary:  

We introduce the rigorous sorting of waste, reduction in disposal quantities, and current state of waste management in the city of Yokohama (including disposal quantities, the processing flow for waste and recyclables, collection, incineration plants, resource sorting centers, recycling, and final disposal sites).

4. Sector:
City : Yokohama Resources and Waste Recycling Bureau
5. Implementation Period:

Currently on-going (G30 Plan was from FY 2002 to FY 2010)

6. Project Site :
The city of Yokohama
7. Stakeholders&Partners:

B. Objective:

8. Objectives:
To reduce environmental burden, and to make effective use and ensure supplies of resources and energy.

C. Activities

9. /Activities:

Yokohama was faced with a looming shortage of disposal site capacity due to an increase in waste as a result of economic growth and population increase beginning in the 1970s.

Under the Waste Management plan of the City of Yokohama.(G30 Plan ,FY2002 – FY2010) formulated in response, we promoted waste sorting and recycling in cooperation with citizens and businesses. As a result, we managed to reduce disposal quantities by about 43 percent.

At present, the collection of waste and recyclables discarded by homes is performed by the city or consignee businesses. Citizens put waste and recyclables out at collection sites only after sorting in terms of prescribed categories.

The city recycles recyclables (cans, glass bottles, PET bottles, paper, plastic packaging, etc.). Waste items that cannot be recycled or transformed back into resources are disposed of in a sanitary manner at incineration plants. The ash from these plants is disposed of by burial.

D. Challenges and solutions:

10. Challenges and solutions:

Agenda include a further reduction of waste quantities, measures for plastic waste (e.g., an increase in the sorting rate and recycling), and decrease in food loss.

E. Outcomes and Impacts:

11. Outcomes&Impacts:

Our promotion of sorting and recycling in cooperation with citizens and businesses had the effect of reducing the disposal quantity (the figure excluding recyclables) from 1,609,155 tons in fiscal 2001 to 914,531 tons in fiscal 2010, for a decrease of 43.2 percent.

As a result, we were able to decrease the number of incineration plants and extend the service life of final (buried) disposal sites.

In fiscal 2018, the total quantity of waste and recyclables came to 1,194,725 tons. Of this total, the city incinerated 72.6 percent and recycled 27.2 percent. The incineration plants make effective use of the waste incineration heat for purposes such as power generation.

F. Budget:

12. Budget:

41,353,034,000 JPY (2019)

13. Source:
General revenue, municipal bonds, national expenditures, and other sources



Video introducing waste management in the City of Yokohama