Japan's Electric Power Development Co., known as J-Power, used 16.86 million tons of coal in 2003, of which about 6 million tons came from mines in Australia in which the company is an investor, said Sou Yoshinaga, a spokesman at J-Power in Tokyo. ``The remaining 5 million tons of coal that we import from Australia comes from one-year contracts at the same mines we hold stakes in as it is cheaper t