Were most soldiers peasant levies, or professionals? What percentage of the army would likely be Samurai? How many cavalry, archers, spearmen, etc, would you expect?
And what kind of formations would they generally fight in?
See:
What was the typical organizational structure of a Japanese army in the Sengoku (Warring States) period of Japan?
How many samurais where there in a standard japanese army compared to non-samurai units (achigaru?) in feudal period of Japan?
What was the standard Japanese army composed of during the 16th century?