The Philippine Sea is a marginal sea east of Philippines. It is a part of the western Pacific Ocean encompassing an area from Palau to Japan.
The Philippine Plate forms the floor of this sea and it subducts under the Eurasian Plate which formed the Philippine archipelago. Between the two plates is the Philippine Trench.The Philippine Islands are tropical.
The Philippine Sea is bordered by the Philippines and Taiwan to the west, Japan to the north, the Marianas to the east and Palau to the south. Adjacent seas include Celebes Sea which is separated by Mindanao and smaller islands to the south, South China Sea which is separated by Philippines, and East China Sea which is separated by Ryukyu Islands.
In June 1944 the Battle of the Philippine Sea, a very large and decisive World War II naval battle between Japan and the United States, took place in the eastern Philippine Sea, near the Mariana Islands.