Sounds like the start of a long march, a walk of war, tired but steady minds going where they must go, their paths littered by battlefields and bodies...
The atmosphere's so good. Interesting samples. The horn sounds like a war horn in my ears, another sign of battle. To push on. To keep going. No matter the foes or omen.
First thought is the volume's a little low; the horn for example could maybe reverberate more and higher, nothing's really prominent or in front... but it's not bad when it's toned down either. Amplifies the sense of fatigue and commitment. Trudging on, no matter what.
Warrior spirit.
Maybe that's naturally what comes to mind when you mention Japanese samples too...
-cd-