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Representative transition issue

Man’en Koban

A reduced-size late Tokugawa gold coin introduced during the foreign-trade monetary crisis.

万延小判

Obverse of a representative Man’en Koban, retaining its oval form Reverse of a representative Man’en Koban, retaining its oval form
As6673 · CC BY-SA 3.0 · exact type representative
Date
1860–1867
Denomination
1 ryō
Form
oval
Local status
Published

Context

Historical and monetary setting

The Man’en reform sharply reduced pure-gold content and brought the monetary gold-silver relationship closer to international conditions.

Identification

How to classify the evidence

Retain the oval outline; inspect punches, borders, file marks, mass, metal, and provenance.

Evidence boundary

What this page does not claim

The installed image is a representative type image, not proof of every Man’en Koban subtype.

Issue evidence

Specifications and date record

Display date
1860–1867
Mass
3.3 g
Catalog fineness
57%
Edge
—
Image status
cleared exact-type representative
Identity confidence
high

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Related transition references

Ansei and Man’en RecoinagesBakumatsu and Early Meiji CoinageForeign Silver in JapanNew Currency Act of 1871Early Meiji Gold CoinageEarly Meiji Silver CoinageEarly Meiji Copper and Bronze CoinageJapanese era-date guide

Evidence

Sources and scope

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

History of Japanese Currency: Opening of the Country and Gold Outflow Bank of Japan Currency Museum

Treaty-port exchange, Mexican dollars, gold outflow, Man’en reform, transitional currency, and the 1871 decimal system.

Open source
Late Tokugawa coin display records Bank of Japan Currency Museum

Museum catalog fineness values for Ansei and Man’en gold and silver issues.

Open source
Finance history article on the Bakumatsu gold crisis Ministry of Finance, Japan

Comparative gold-silver ratios and the Man’en Koban response.

Open source