Original sentence: Opponents claim that the name "East Sea" is not suitable as an international geographic name, because it could refer to various places including the neighbouring East China Sea, and used as compound words such as the East Sea Fleet and the East Sea Bridge
Edited sentence: Japanese groups claim that the name "East Sea" is not suitable as an international geographic name, because it could refer to various places including the neighbouring East China Sea, and used as compound words such as the East Sea Fleet and the East Sea Bridge