Hidden Fortress @imdb
Too bad they couldn't afford color. Maybe they could but preferred b&w.
There's a sequence where the two peasants are chasing a woman through the forest and the woman uses saplings and tree branches to beat them off. She bends them back and lets them snap against her pursuers. Since I've done that myself, probably during a game of capture the flag, it gives the scene great authenticity. You really feel like you're in the forest with them.
I have never seen a real forest used to such effect. That scene must have taken days to shoot.