Urban Composting Project

What is the Urban Compost Project?

This is a proposal for a composting system by Green Journey, that city dwellers can easily incorporate into their daily lives. Inside a bag made from discarded coffee jute bags, a paper bag containing the base material is provided. When the bag is full, it can be exchanged for a new bag of base material at the collection point. The collected base material and food waste will be used as compost in Green Journey’s natural farming fields. This composting system can be placed on the balcony of apartments, and by using the collection, even those without their own garden will not have to worry about where to put the compost. Also, people without cars can use cute coffee jute bags to carry the compost by train or bicycle. We will examine how much waste can be reduced by this urban composting system, and we aim to find a form of composting that urban residents can continue to use.

What is Compost?

Composting is a process of turning food scraps, fallen leaves, and other organic matter into compost through fermentation and decomposition using the action of microorganisms. By composting food scraps that are currently thrown away, the food cycle is turned around, and the amount of watery food scraps that are incinerated is reduced, which leads to decarbonization.

Background of the Compost Project

Over the years, Green Journey members have tried and failed with various types of composting. Many of the reasons were that there was no use for the soil, the amount of compost was too small, and it could not be transported to the collection sites without a car. We thought that if we could create a composting system that solved these problems, people living in urban areas would be able to continue composting without difficulty.



Pick up your composting kit at the collection site.


Place food scraps in a paper bag containing the substrate.


When the bag is full, bring your stash to the collection center.
Collection is free of charge.

Akiko Watanabe

Compost Project Leader


Let’s turn food waste into a resource!

Course Introduction

Please choose a hemp bag of your favorite shape (2,500 yen). 
The base material (800 yen) is free of charge during the current social experiment.

Composting on-site lectures are also very popular

We also offer composting courses for nurseries, schools, and companies, and we can help you with composting installations. In recent years, there has been an increase in efforts to incorporate composting in company cafeterias and other places where vegetable scraps are generated. Composting is an opportunity to raise awareness of food education and environmental activities in a proactive manner. In our on-site lectures, we provide concrete information on everything from the mechanism of fermentation to how to use it. Here, we will welcome Mr. Yuichiro Takatani of BLUE COMPOST and use a special BLUE COMPOST box.

Traveling Lecturer
Mr Yuichiro Takaya

BLUE COMPOS T representative


Circulate resources with the help of microorganisms!