Four Japanese teams were among 38 solar cars that set out Sunday from the northern Australian city of Darwin on a 3,000-kilometer endurance race through the center of continent.Teams from 19 countries and regions have entered this year's World Solar Challenge, vying to be first across the finish line in the southern city of Adelaide.They departed Darwin in order of their performance in time trials held Saturday, with Nagoya Institute of Technology's car, "Horizon 17," the second to take off behind Belgian entrant "Punch Two."Nagoya Institute of Technology team director Hiroki Tanaka told Ky…READ FULL ARTICLE