7. Japan
With 247,173 active members, the Japanese military, known as the Japan Self-Defense Forces, is quite tiny in absolute terms. Yet, the nation is adequately safe, thanks to the Imperial Japanese Ground, Maritime and Air Self-defense force. Their commander-in-chief is the Japanese Prime Minister. It has the 4th largest submarine fleet among all the other countries. Japan also has 4 aircraft carriers, although they only have a few helicopter fleets on board. In addition, Japan has the fourth-largest assault helicopter fleet behind the US, China, and Russia.