A traditional Japanese unit of volume. The to equals 10 sho, which is about 18.039 liters, 3.968 British Imperial gallons, or 4.765 U.S. liquid gallons
Russ Rowlett (Director), How Many? A Dictionary of Units of Measurement, Center for Mathematics and Science Education University of North Carolina, USA 2005. http://www.unc.edu/~rowlett/units/dictA.html, (Unit of Meas and Covr Factors - Amer) {608}