kwan

a traditional Japanese unit of weight equal to 6.25 kin (see above), which is about 8.27 pounds or 3.75 kilograms.
Found on http://www.unc.edu/~rowlett/units/dictK.html

Kwan

The kwan was a Japanese unit of weight equal to 8.2673 lbs.
Found on http://www.probertencyclopaedia.com/browse/AK.HTM
No exact match found