Three automaker executives, Hitoshi Kawaguchgi (L) of Nissan Motor, Kiyotaka Ise (2nd L) of Toyota Motor, Toshihiro Mibe (2nd R) of Honda Motor and Hiroya Nishijima (R), vice president of the JX Nippon Oil and Energy and president of the HySUT shake hands as they agree to support a joint project for the development of hydrogen stations across Japan during a press conference in Tokyo on July 1, 2015. Toyota started to sell the 'Mirai ' fuel cell vehicle last year, Honda will begin sale of a new fuel cell vehicle in 2015 and Nissan is expecting a release in 2017.   AFP PHOTO / Yoshikazu TSUNO        (Photo credit should read YOSHIKAZU TSUNO/AFP/Getty Images)