Excavated Gold Coins of the Edo Period
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Coin ("Koban") Minted in the Genroku Era
Found off the coast of Ōshima Town, Tokyo,Edo period, 17th - 18th centuryJapanese Archaeology and Special Exhibition (Heiseikan) Japanese Archaeology Gallery
September 9, 2025 (Tue) - February 1, 2026 (Sun)In February of 1957, a man harvesting shellfish about 250 meters off the coast of Tokyo’s Izu Ōshima island accidentally discovered koban coins on the sea bed.
Following this incident, a total of 103 koban and 63 ichibukin, which are smaller and rectangular, were found.
The reason for why these gold coins were lost at sea is still a mystery.
| Designation | Name | Creation/ Excavation/ Provenance |
Period | Acquisition/ Ownership/ Accession Number |
CMT | ||
| Highlight | Coin ("Koban") Minted in the Keichō Era | Found off the coast of Ōshima Town, Tokyo | Edo period, 17th century | J-37245-6 | |||
| Highlight | Coin ("Koban") Minted in the Genroku Era | Found off the coast of Ōshima Town, Tokyo | Edo period, 17th - 18th century | J-37245-51 |