London, Sept. 9 (Jiji Press)--"Shichiken Hakushin," a sake from Yamanashi Prefecture, central Japan, was awarded this year's top prize of the sake division at a renowned annual international wine competition held in London on Tuesday. The high-end "junmai daiginjo" product made by Yamanashi Meijo Co. from the city of Hokuto became the first sake from the prefecture winning the Champion Sake...