Junkan Seikatsu Lab Cardboard-Box Composting (Fukuoka)
Fukuoka, Japan · Operator: NPO法人循環生活研究所（じゅんなまけん）
Overview
A Fukuoka-based citizen group that has researched and spread the 'cardboard-box compost' method—decomposing kitchen waste using only microbes—for over two decades, turning household food scraps into compost within the neighborhood to build a 2-km-radius nutrient cycle.
Citizen participation
Residents compost their own kitchen scraps at home in a cardboard box with bulking material, then share and use the finished compost via workshops and community gardens.
Operating model
Run as an NPO through workshops, compost-kit sales, and municipal/corporate diffusion programs; the spin-off Local Food Cycling Inc. commercialized an urban bag-type composter.
Impact
Became a nationwide model for cardboard-box composting, cutting incineration and CO2 from food waste while building community, and seeded the urban-composting venture Local Food Cycling.
Crops
- leafy greens
- tomatoes
- herbs
- home-garden vegetables
Scale
都市の家庭・ベランダ規模のダンボールコンポストを核に、半径2km圏の栄養循環を地域単位で普及。照葉地区など数百世帯が参加した実証も。
In the media（2）
Web articles and features that cover this case.
Sources（1）
This entry is compiled from the public sources, official sites and research below.
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