kan
貫 — Measuring
A unit of a thousand cash coins strung together.
Haedong WonboEarly 12th century
Akçe (Mehmed II, first reign)1444–46
Sangpyeong Tongbo (four denominations)From 1678
This unit originates from stringing pierced coins together. ⚠ However, in some regions it became standard for a string of less than one thousand coins to be accepted as a full kan. Even units of counting diminish if left unattended.