Two-time defending champion Yuma Kagiyama topped the men's singles short program Friday while fellow title holder Kaori Sakamoto was the best of the women on the opening day of the NHK Trophy, the fourth stop of the figure skating Grand Prix series.Beijing Winter Olympic silver medalist Kagiyama scored 98.58 to place first in the segment ahead of countryman Shun Sato on 96.67 and South Korea's Cha Jun Hwan on 91.60 at Towa Pharmaceutical RACTAB Dome in Osaka Prefecture.The 22-year-old Kagiyama, competing in his first Grand Prix event of the season, cleanly executed his jumps, including an o…READ FULL ARTICLE