The Earthshot Prize selects WOTA as the only finalist from Japan.


The Earthshot Prize – The most prestigious global environment prize in history.

WOTA Corporation (Head Office: Toshima-ku, Tokyo, CEO: Yosuke Maeda, “WOTA”) is pleased to announce that our product, WOTA BOX, has been selected as the only Japanese finalist for The Earthshot Prize, an environmental award established in 2020 by Prince William, Duke of Cambridge and the Royal Foundation to solve global environmental challenges. The first award ceremony will be held in London, UK on Sunday, October 17, 2021, and our CEO, Yosuke Maeda, will be participating online.

■ The Earthshot Prize official website :

Launched by Prince William and The Royal Foundation in October 2020, The Earthshot Prize is the most prestigious global environment prize in history and is designed to discover, spotlight and scale solutions to the world’s greatest environmental challenges. The Earthshot Prize is centred around five ‘Earthshots’ – simple but ambitious goals for generations to come. Our “WOTA BOX” has been selected as one of the solutions to realize “Build a waste-free world” and is the only finalist from Japan.

WOTA is developing small-scale decentralized water reuse systems and autonomous control system for water treatment. We exist to  “Remove all restrictions by water in our life.” Our first product, WOTA BOX, launched in November 2019, is a portable water reclamation treatment plant that can recycle and reuse more than 98% of domestic wastewater.It provides a city-wide water network with a device that is only 0.25 cubic meters in size, enabling continuous water use in situations where there is no water supply, such as when water is cut off due to a disaster. Our second product, “WOSH,” announced in July 2020, is a water circulation type hand washing machine that can be installed in places where there is no running water. In addition to hand washing with water, it also has a function to sterilize the surface of smartphones by over 99.9%, contributing to the update of public and space hygiene.

▲WOTA BOX – Autonomous, Decentralized Water Reuse System

▲WOSH – Water circulation type hand washing stand

WOTA will continue the research and development for the realization of a small-scale decentralized water reuse society.

For more information about the finalists of The Earthshot Prize, please click here.

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