noun
Japan Maritime Self-Defense Force; JMSDF
Official name of Japan's naval defense branch. Often abbreviated as 海自 (かいじ).
日本海上自衛隊は、日本の領海を守る任務を担っている。
The Japan Maritime Self-Defense Force is responsible for protecting Japan's territorial waters.
Compound of 日本 (Japan), 海上 (maritime), and 自衛隊 (Self-Defense Force). The name reflects its role as Japan's naval defense organization.