Silverstari currency.

Historical Koku (OOC)

The koku is unit of volume. In this definition, 3.5937 koku equal one cubic metre, i.e. 1 koku is approximately 278.3 litres. The koku was originally defined as a quantity of rice, historically defined as enough rice to feed one person for one year (one masu (square wooden box) is enough rice to feed a person for one day). A koku of rice weighs about 150 kilograms (23.6 stone or 330 pounds).

Koku was also used to measure how much a ship could carry when all its loads were rice. Smaller ships carried 50 koku (7.5 t) while the biggest ships carried over 1,000 koku (150 t). The biggest ships were actually larger than military vessels owned by the Shogunate.

Sourced from http://en.wikipedia.org/wiki/Koku

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