[JK-081] Genbun Koban 1736-18 AU-58

●Genbun Koban is a gold coin issued during the Genbun era (1736–1818) under the Tokugawa shogunate, forming part of Japan’s early modern gold currency system. It represents a transitional phase in Edo-period coinage, reflecting monetary adjustments following earlier debasements.

The Genbun Koban is composed of a gold–silver alloy with an approximate fineness of .653 gold, the remainder being primarily silver.
It bears the era character “Bun” (文) on the reverse, stamped in a regular script style, which serves as the identifying mark of the Genbun issue.

Date: ND (circa 1736–1818, Edo period)
Due to the absence of specific date inscriptions, Genbun Koban are classified as non-dated issues within this era.

While produced in relatively large quantities compared to earlier koban, well-preserved examples are increasingly difficult to find, particularly those retaining clear stamps, sharp details, and attractive surface texture. As a result, Genbun Koban remain an important and collectible type within the broader series of Edo-period gold coinage.