Said to maintain domestic stability and protect the interests of expatriates, but in reality, it is clear to all that the Island Nation's expansion of its military is to strengthen its power projection in East Asia and safeguard its strategic interests in East Asia, even in the Far East.
This can be seen from the current scale of the Island Nation's active military and the number of reservists. The Island Nation's active military has reached nearly 300,000, with over 200,000 troops available for overseas operations.
This is not simply to defend the country's territory. With 200,000 combat troops just by number, it has already surpassed the number of Russian troops in the Far East, let alone the nearly two million reservists the Island Nation has on hand.
The purpose of having such a large military is definitely not simple, especially since the Island Nation is also strengthening its military weapons and equipment as well as increasing the number of navy ships.