The city government of Ishigaki, Okinawa Prefecture, has conducted its third marine survey around the Japanese-administered Senkaku Islands, with Jiji Press and other reporters allowed to board its survey ship. During the survey, which lasted from Thursday to Saturday, Chinese coast guard vessels entered Japanese waters around the islands and attempted to interfere with the city's ship, but Japan Coast Guard vessels blocked the move. The city survey ship's journey to the area was the first since January last year. The latest survey was joined by Ishigaki Mayor Yoshitaka Nakayama and some lawmakers, including former Defense Minister Tomomi Inada. The Japanese government did not allow the survey participants to land on the islands.