The Environment Ministry has decided to provide funding from April for the promotion of an electrical energy-saving mechanism for homes.
The junction-box device is about the size of a laptop computer and is equipped to regulate electrical power at 100 volts.
The project is part of Japan's efforts to fight global warming by reducing emissions from homes and offices, according to ministry officials.
With your current subscription plan you can comment on stories. However, before writing your first comment, please create a display name in the Profile section of your subscriber account page.