Fiefs Were Measured By How Much Food They Produced
All samurai had duties and were paid stipends, and from this they had to buy whatever of their equipment wasn’t issued and furnish their household (if they had one). The basis for the economy was rice, and a unit of rice that could feed a man for a year, called a koku, was the universal measure of wealth. Fiefs and estates were described in the terms of how many koku of rice they produced. One koku is 120 litres. The lowest samurai received a little less than a koku (assuming his meals were all on his lord’s estate’s books).
Middling lords, and castle commanders, might receive a stipend of several hundred koku, and with that he had to pay the samurai in his service, supply his garrison, feed his horses, pay his servants, etc. For convenience sake, hard cash was used to make payments, but ultimately it was a rice-based economy. Even the Takeda of Kai, who sat on the most valuable gold mines in the nation, needed rice to feed their soldiers.
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