Honda FCX fuel cell vehicle on show at Indy Japan 300

Honda's zero-emission FCX Clarity fuel cell vehicle will serve as the official car of the Indy Japan 300 this weekend at Twin Ring Motegi in Tochigi, Japan.

The FCX Clarity will act as a pace car at the start of the race in a move designed to promote the IndyCar Series' green credentials as the first major motor racing series in the world to run all of its cars on 100 percent fuel-grade ethanol in all of its cars.

Scheduled for release in the U.S. this summer and in Japan in the fall, Honda's fuel cell flagship is powered by the highly-compact, efficient and powerful Honda V Flow fuel stack that runs on hydrogen and emits only water.

Late last year, Honda also revealed plans to complement the FCX with its fourth-generation home-based hydrogen generation and fueling system. The Home Energy Station IV runs on a natural gas supply to produce and store hydrogen for use as fuel as well as providing heat, hot water and electricity to an average-size home.