Two-time defending women's world champion Kaori Sakamoto earned a spot at March's worlds by winning her third straight Japan national title Sunday.Sakamoto, who entered the nationals fresh off her first Grand Prix Final title this month, took an 8.86-point lead into her free skate at Nagano Big Hat from Friday's short program.She brought the house down with a flawless, energetic performance that earned her 154.34 points, surpassing her international season's best score of 151.00. Sakamoto's 233.12 total clinched her fourth career national championship, although she admitted having doubts ab…READ FULL ARTICLE