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BIBLIOGRAPHY

Japanese Wikipedia: "Edo period trimetallic system", "Keichō Chōgin"

Wikipedia (according to the sources of each article)

Claims Supported by This Source

  1. Koban were counting coins at one ryō per piece, Chōgin was a currency by weight in kan and monme, and Zeni were in mon.
  2. Use of gold in Edo, use of silver in the Kamigata region (Osaka).
  3. Casting of Keichō Chōgin began in the 7th month of the 6th year of Keichō (1601) ("Keichō Chōgin").

How to read the verification levels. 'Read' means the material was read in its entirety. 'Bibliography and abstract confirmed' means the bibliographic information and abstract were verified. 'Via course material' means the source was referenced through the main text of a book or a country's monetary history. The text hash is the SHA-256 of the main text from the original source page, excluding tags and whitespace, used to detect if the material has been altered.