Male sprinter Ryota Yamagata was chosen to captain Japan's Tokyo Olympic delegation, the Japanese Olympic Committee said Thursday, with female table tennis player Kasumi Ishikawa named vice captain.Yamagata and Ishikawa, both Olympic medalists who will be competing in their third straight games, are expected to swear the Olympic Oath during the July 23 opening ceremony at the National Stadium.A source with knowledge of the matter said it was not easy to select athletes to accept the positions. The roles require athletes to speak in public and represent the Olympic team, with some candidates…READ FULL ARTICLE