The cabinet 's oceanic policy department said the names will not alter any maritime perimeters , and said the initiative is part of an ongoing effort to manage the various islands that fall within japan 's eez .
Under the un 's convention on the law of the sea , an eez can extend up to 200 nautical miles from a country 's shoreline .
根据联合国海洋法公约“专属经济区可以延伸到距一个国家的海岸线200海里”。
Naming the 39 islands may boost japan 's assertions that they lay within its eez , and the country has gone to considerable lengths in the past to protect and extend its eez to secure jurisdiction over a sea area .