How many people live in Rokugan, would you say?
How many of them are from the Samurai-class?
As a reference, by 1200, 16 million people lived in France, 3.5 Million in England, 50 Million in China. By 1600, 20 Million in France, 4 Million in England, 90 million in China.
In Edo Japan, 7-8% of the population was samurai.