Japan had a big day in the quarterfinals at badminton's world championships on Friday, with six medals guaranteed ahead of the competition's final two days.In women's doubles, a win by 22-year-olds Mayu Matsumoto and Wakana Nagahara on Saturday will set up an all-Japanese final after three Japanese pairs reached the last four. One men's doubles pair also booked a semifinal berth as did Akane Yamaguchi in women's singles and Kento Momota in men's singles.The six medals will surpass Japan's high of four, achieved last year in Glasgow, Scotland, with one gold, one silver and two bronze.Matsumo…READ FULL ARTICLE
