Convert from truss to kwan [Japan]

Unit Definition (truss)
The truss is a traditional weight unit, generally equal to 4 stone or 56 pounds (about 25.4 kilograms). The truss was used primarily for measuring hay. In 1795, Parliament specified that a truss of hay should equal 56 pounds for old hay or 60 pounds (about 27.2 kilograms) for new hay.

Unit Definition (kwan [Japan])
The kwan is a traditional Japanese unit of weight equal to 6.25 kin, which is about 8.27 pounds or 3.75 kilograms.