Toshikazu Yamanishi won gold in the men's 20-kilometer race walk at the athletics world championships on Saturday, giving Japan a clean sweep of the men's walking world titles while sealing a 2020 Tokyo Olympic berth for himself.A week after Japanese compatriot Yusuke Suzuki took the 50-km race walk gold, Yamanishi overcame Doha's heat and humidity to cross the finish line just before 1:00 a.m. in a winning time of 1 hour, 26 minutes, 34 seconds.The 23-year-old, a graduate of Kyoto University, increased his tempo around the 7-km point when China's Wang Kaihua made a bold move. Yamanishi ove…READ FULL ARTICLE