Upon learning that the war in the Ryukyu Islands had fallen into a disadvantage, the government of the Island Nation became somewhat restless.
The Ryukyu Islands are very close to the native land of the Island Nation and could pose an even greater threat to the whole of East Asia, a scenario the Island Nation was unwilling to see.
What's more critical is that, in terms of air power, the Island Nation was clearly at a disadvantage.
If the Ryukyu Islands were occupied, as long as Australasia established a large air force base there, the southern coastal cities of the Island Nation could be bombed at any time.
And now, the only support the Ryukyu Islands could count on was from the navy, which was evenly matched with that of Australasia.