Reborn in the Anti-Japanese War Era: Killing Japs Levels Me Up

The protagonist is a radical young man who accidentally travels back to the Anti-Japanese War era. Here, he unexpectedly gains a "kill Japanese soldiers to level up" system. Each Japanese soldier he kills grants him system rewards, enhancing his abilities. Wielding a sharp blade, he weaves through a hail of bullets, easily felling the Japanese.

That's great, it looks really good! Keep it up! It would be nice if the system gave you some equipment!