Reborn: Back Home to Fight the Japanese

A modern-day office drone is reborn in his ancestral homeland. He thought life would be easier without the grind, but then he ran into something even more exhausting! The Japanese invaders, the traitors and the turncoats throwing their weight around have brought shame upon his homeland! But sadly, there are no forces of his own here, only an unconventional army! As someone born under the red flag, what should he do... This book doesn't focus much on its System. If that's not your thing, please don't flame me.