Japan’s Coast Guard says 3 Chinese patrol ships temporarily entered Japanese territorial waters near the Senkaku Islands in the East China Sea on Friday. Coast Guard officials said the 3 vessels entered the territorial waters off Uotsuri Island in Okinawa Prefecture at about 10:30 AM. They said the ships stayed in the area for about 90 minutes before moving to the contiguous zone just outside the territorial waters.This is the 6th day this year that Chinese government vessels have entered Japanese waters off the Senkakus. The previous incursion was conducted on March 2nd. Japan controls the Senkaku Islands. The Japanese government maintains the islands are an inherent part of Japan’s territory. China and Taiwan claim them.