The deterrent worked and the Taiwanese ships left the area , the Japanese Coast Guard said . Taiwanese protest ##ors returning home after run - in with Japanese Coast Guard . Japan officers fired a cannon on the boat which entered disputed waters . Activists had planned to build statue of sea goddess Matsu on island . The islands are disputed by Taiwan , Japan and China .
Taiwanese protest ##ors returning home after run - in with Japanese Coast Guard . Japan officers fired a cannon on the boat which entered disputed waters . Activists had planned to build statue of sea goddess Matsu on island . The islands are disputed by Taiwan , Japan and China .