海上保安 refers to maritime security and safety operations conducted by specialized agencies to protect the seas and coastal areas. These operations include search and rescue missions, law enforcement against illegal activities, and ensuring safe navigation for vessels. In many countries, such as 日本, the 海上保安庁 (Japan Coast Guard) plays a crucial role in maintaining maritime order. They monitor shipping routes, respond to emergencies, and collaborate with other nations to address maritime threats, ensuring the safety of both people and the environment at sea.