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Tokugawa monetary system

Chogin and Mameitagin

Elongated Chogin and small irregular Mameitagin formed complementary shapes within principally weight-valued Tokugawa silver.

丁銀・豆板銀Chōgin and Mameitagin

Chogin and Mameitagin, documented face 裏Exact reverse image unavailable
As6673 · Public domain · Representative documented issue for this broader family; not every standard or stamp arrangement. · one face documented
Branch
silver
Years
1601–1860s
Form
elongated bar or ingot
Valuation
principally by weight

Context

Historical and monetary setting

Both families followed successive silver standards administered through Ginza institutions and weighing practice.

Identification

How to classify the object

Use form, era character, stamps, surface fabric, weight, and fineness context; irregularity is expected rather than damage to normalize.

Evidence boundary

What this page does not claim

No one image, outline, or mass represents every Chogin or Mameitagin.

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Related Edo references

Genroku Chogin: Weight-Valued Bar SilverGenroku Mameitagin: Small Weight-Valued Silver

Evidence

Sources and scope

These links support the claims on this page. Source authority does not imply permission to republish source images.

Early Edo Silver Recoinages Bank of Japan Currency Museum

Keicho, Genroku, and Hoei Chogin and Mameitagin fineness sequence.

Open source
Later Edo Silver and Ginza Offices Bank of Japan Currency Museum

Shotoku through Ansei silver fineness, denominated silver, and Ginza locations.

Open source