Population is the number of units and the capacity that can hold in the game. One unit counts one in the game. The more the units, the slower the Peasants generate in Peasant Huts. Zen Masters, Monks, Ninjas, summoned units, wolves and horses are not counted in population.
In the maximum population are the following:
- 20 - The game setting is set the Population to low
- 30 - The game setting is set the Population to medium
- 40 - The game setting is set the Population to high
- 50 - The game setting is used only in the last mission of Kenji's Journey - Dragon Road
The theoretical overpopulation in the game is 80 by using 40 Battle Maiden's Double Image.