Almost six months have passed since a natural gas fuel station was opened on the premises of the metropolitan government complex in Tokyo's Shinjuku Ward as part of a public campaign to reduce vehicle exhaust pollution in the capital.

Thanks to its central location and media attention, the station has seen a growing number of vehicles visiting the facility, from 337 in April to 916 in August.

While Tokyo Gas Co., which runs the station, expects a further rise in clientele, the future of the alternative fuel remains unclear due to a limited number of outlets.