Two Japanese bus manufacturers have supplied four hybrid buses fitted with a diesel-electric driveline for free shuttle bus services at the Tokyo Haneda airport.?Hino has supplied one while Mitsubishi Fuso supplied three: these vehicles now link Haneda's first, second and international terminals, covering a distance of about 4.2 kilometers, and in one day, they may each travel up to 300 km.

Background behind this project is the challenge to reduce CO2 emissions. Technologies for reducing consumption, such as hybrid drive, are now gaining significance; and customer demand is changing to the same extent. The buses are fitted with lithium-ion batteries, which have to withstand ten years of daily operation and more than 500,000 km of driving. All buses are fitted with brake energy recovery systems.