Marunouchi Honey Project (Rooftop Urban Beekeeping)
Chiyoda, Tokyo, Japan · Operator: 三菱地所株式会社／一般社団法人エコッツェリア協会（丸の内ハニープロジェクト実行委員会）
Overview
An urban-beekeeping project by Mitsubishi Estate and the Ecozzeria Association on rooftops in the Otemachi-Marunouchi district. Area workers join beekeeping, honey harvesting and forage planting, with the honey circulating back into the district — a worker-participation model of rooftop food/biodiversity town-making.
Citizen participation
Workers in the Otemachi-Marunouchi-Yurakucho (Daimaruyu) district take part in rooftop beekeeping and honey harvesting, often before work. Through bee-friendly planting and honey-harvest experiences they learn about biodiversity; the honey supplies local restaurants and hotels, is sold at markets and turned into products with local firms. Children's harvest sessions are also held.
Operating model
Run by Mitsubishi Estate and the Ecozzeria Association as part of nature-positive, biodiversity-conscious town-making and community building; the honey also circulates into local business.
Impact
Transforms central-business-district rooftops into venues for biodiversity and food experience; in its 10th year it now feeds pollen-DNA analysis back into district greening, building worker awareness and community.
Crops
- honey
- pollinator-plants
- herbs
Scale
大手町ビル等の屋上で養蜂。年間最大約40万匹のミツバチを飼育、2025年度の採蜜は約800kg。2016年7月に実行委員会を設立、2025年で活動10年目
Sources（3）
This entry is compiled from the public sources, official sites and research below.
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