Representative Edo issue
Keicho Ichibukin: One-Bu Rectangular Gold
The Keicho Ichibukin expresses one bu, one quarter of a ryo, in compact rectangular gold form.
慶長一分判Keichō Ichibukin
- Years
- From 1601
- Metal branch
- gold
- Value or unit
- 1 bu
- Catalog fineness
- —
Context
Historical and monetary setting
It belongs to the early declared-value gold structure established under Tokugawa authority.
Identification
How to classify the object
Both faces, border punches, central motifs, mass, and issue-specific fabric must agree.
Evidence boundary
What this page does not claim
The low-resolution public-domain pair is identification context, not a grading photograph.
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Related Edo references
Evidence
Sources and scope
These links support the claims on this page. Source authority does not imply permission to republish source images.
Gold, silver, and copper valuation conventions; Oban, Chogin, and Mameitagin roles.
Open source