りょうかい領海ryoukai
1.

A maritime zone adjacent to a coastal state over which that state exercises sovereignty, typically extending up to twelve nautical miles from the baseline at low tide.

2.

The specific area of water that is considered part of a country's territory, distinguished from international waters, where the coastal nation has legal rights and control.

3.

A designated strip of ocean surrounding a nation, where the government has the authority to enforce laws, manage resources, and regulate passage, as governed by international maritime law.

りょうかいしんぱん領海侵犯ryoukaishinpan
1.

The act of entering a nation's maritime boundary without permission, often considered a breach of sovereignty.

2.

An infringement on a country's designated sea area that is protected under international law.

3.

The unauthorized crossing into a coastal state's waters, which can lead to diplomatic tensions or conflict.

4.

A situation where foreign vessels penetrate a state's territorial waters, challenging the enforcement of maritime laws.