How did a small island nation in the Pacific manage to take over a huge chunk of China?

How did a small island nation in the Pacific manage to take over a huge chunk of China?

Tech.

China in the 20s and 30s was a mess

All those islands. Surf is up on a few.

It's still a mess today.

China hasn't been a real superpower for hundreds of years now.

A mess in the sense that there was no unified government to oppose the Japanese.

Japan might not be as big, but they were a lot more developed and have always had a huge population

Righteous anger that had been brewing for generations after getting their shit slapped by turtle boats.

Higher IQ = better culture = better society = better technology = invade and conquer your shitskin neighbors.

I believe coming from (and adapting to) an island archipelago also gave some advantages. The English people had the same things.

China was weak and broken thanks to empress retard, even the Dutch were carving it up for themselves before that.