MONTPELLIER, France—Japan’s Kaori Sakamoto claimed her maiden figure skating world title when she prevailed in the women’s singles event in a depleted competition at which Russia’s invasion of Ukraine still loomed large on Friday. Sakamoto, a bronze medallist at the Beijing Olympics, finished ahead of Belgium’s Loena Hendrickx and American Alysa Liu, who were second and third respectively. In the absence of Anna Shcherbakova and Alexandra Trusova, the Beijing Games gold and silver medallists, after Russian skaters were banned from competing following Russia’s military action in Ukraine, Sakamoto delivered. She improved her personal best in the free skate to 155.77 for a total of 236.09 for a deserved victory. “Four years ago, I didn’t compete at the worlds after the Olympic Games because I felt burned out. It wasn’t easy to get ready for this just a month after the Games, but I’m glad I did. It was all worth …