Japan designer harvests electricity from soil, aiming to power future

In a remote town in Japan, a greenhouse-like laboratory called "Ku-An" hums with electricity generated from 1,500 boxes of soil and compost. This is the test site for Satoshi Nakagawa's "micropower collection (MPC)" technology, a method he believes can help solve global energy challenges.

Nakagawa, chief executive of design firm Tripod Design, has long faced skepticism but remains convinced that harnessing small electrical currents from everyday materials like soil, beverages, or even bread can contribute to energy production. His system utilizes the principle of the voltaic pile, the first electrical battery invented in 1799, by inserting electrodes into moist substances to collect a steady electrical current.

The "Lu-An" facility, located near "Ku-An," uses 2,000 plastic cylinders of soil and compost to produce 100 watts, enough to power appliances like a rice cooker. Nakagawa envisions this technology as a solution for areas lacking power, especially after natural disasters. It could also energize low-power devices such as agricultural sensors or security alarms.

Unlike weather-dependent renewables like solar or wind, Nakagawa's MPC technology produces no carbon dioxide and operates consistently. He has also explored artistic applications, creating installations where soil-powered objects glow like fireflies. While professional engineers acknowledge the aesthetic and thought-provoking nature of his designs, they question the practicality and output of his system.

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As the population moves toward 10 billion, energy issues will become just as critical as food issues. Even if it's just a small contribution, I want people to be able to produce their own electricity using the soil around them.