Translation guide
The term 'armed forces' refers to a country's military organizations, including the army, navy, and air force. In Japanese, the most common and neutral term is 軍隊 (guntai), but other expressions exist depending on context, formality, and whether referring to Japan's Self-Defense Forces or foreign militaries.
Referring to the military in general, without specifying a particular branch or country.
The most common and neutral word for 'armed forces' or 'military'. Can refer to any country's military.
彼は軍隊に入った。
He joined the armed forces.
軍隊が国境に配備された。
The armed forces were deployed to the border.
A shorter, more formal term often used in compounds or official contexts. Can mean 'military' or 'army'.
軍の力が増強された。
The strength of the armed forces was increased.
Specifically referring to Japan's military, which is constitutionally named the Self-Defense Forces.
The official name for Japan's armed forces. Use this when talking about Japan's military specifically.
自衛隊は災害救助にも出動する。
The Self-Defense Forces are also deployed for disaster relief.
彼は自衛隊のパイロットだ。
He is a pilot in the Self-Defense Forces.
Emphasizing the combined army, navy, and air force.
Literally 'army, navy, air force'. Used to refer to all branches together.
陸海空軍の統合演習が行われた。
A joint exercise of the armed forces was conducted.
Referring to the military as a political or social institution.
Refers to the military authorities or the military establishment, often in historical or political contexts.
当時、軍部が大きな権力を持っていた。
At that time, the armed forces held great power.
軍隊 (guntai) is the general term for 'armed forces' and can be used for any country. 自衛隊 (jieitai) is the specific name for Japan's Self-Defense Forces. Using 軍隊 for Japan's forces can be politically sensitive because Japan's constitution renounces war; 自衛隊 is the neutral, official term.
The literal translation '武装した軍隊' (busō shita guntai) is redundant and unnatural. Simply use 軍隊 or the appropriate term.