William Powrie and Gina Hara has commented about JR East Railways
The East Japan Railway Company (JR-East),
as part of research aimed at developing more environmentally friendly train stations, is testing an experimental system that produces electricity as people pass through ticket gates. JR claims that this sort of human-powered electricity generation system may provide a portion of the electricity consumed at train stations in the future.The ticket gate electricity generation system relies on a series of piezo elements embedded in the floor under the ticket gates, which generate electricity from the pressure and vibration they receive as people step on them. When combined with high-efficiency storage systems, the ticket gate generators can serve as a clean source of supplementary power for the train stations. Busy train stations (and those with large numbers of passengers willing to bounce heavily through the gates) will be able to accumulate a relatively large amount of electricity.