Shu (coin)

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This article is about a unit of coinage during the Edo period. For other uses, see Shu.

The Shu (朱) is a Japanese gold or silver square coin that circulated during the Edo period.

## Gold coinage[edit]

### One Shu[edit]

Gold Shu c.1824

Shu coins with a gold alloy first originated during the Bunsei era as they were first minted sometime in May 1824. These first square coins feature a Paulownia crest with 1 Shu (一朱) on the obverse and has Shozaburo Goto's [ja] signature engraved on the reverse. Initially, they were struck with an alloy of 12.3% gold, 87.4% silver, and 0.3% other miscellaneous material with weights of 1.40 grams.[1] The gold content was intentionally kept low as the Shu was intended to be a subsidiary currency of the Ichibuban, and Koban.[2]

When they were issued for circulation in July of the same year counterfeiters quickly took advantage of their quality. Of issue was the coin's low gold purity as its color was easy to replicate. Although efforts were made to dissolve any silver content on the coin's surface, the gold coloring wore off through circulation which gave way to a mixed and eventually silver coloring.[3] These coins also proved to be unpopular with the public as they were small, unwieldy, and easy to lose.[4] Replacements for the gold Shu in the form of silver coinage began on July 10, 1829, and gold Shu coinage ended in the 3rd year of Tenpō (1832). Legally, the series was discontinued at the end of the 11th year of Tenpō (1840).

### Two Shu[edit]

Tenpō Ni Shuban

The Two Shu (二朱金) coin was also struck in a gold square shape and circulated during the Edo period. While technically the first "2 Shu" coins date to the 10th year of Genroku (1697), these had the same grade as Ōban and are included with that type of coinage.[5] Those issued at a later period include 2 different varieties which have their name tied to the era of their first mintage. The Tenpō Ni Shuban (天保二朱判) began to be minted on September 3, 1832, and entered into circulation on October 24 of the same year. Like the previously issued "1 Shu" coins, these were subsidiary currency of the Ichibuban. Differences include a weight increase of 1.64 grams each, and a higher gold content with an alloy of 29.9% gold, 69.7% silver, and 0.4% other miscellaneous material. Two Shu coins circulated for more than 30 years before they were suspended at the end of May 1866.

In the later years of Tenpō Ni Shuban coins, a new variety called Man'en Ni Shuban (万延二朱判) began to be issued on April 10, 1860. These were the thinnest gold coins of the Edo period weighing just 0.75 grams each with an alloy of: 22.9% gold, 76.7% silver, and 0.3% other miscellaneous material. Man'en Ni Shuban coins circulated until the end of September 1874 when they were replaced by the newly adopted yen.

## Circulation figures[edit]

### Gold[edit]

Man'en Ni Shuban Denomination  | Era Namesake[a] | Japanese dates[b] | Gregorian dates[b] | Mintage

|
|
|
|

1 Shu

Bunsei

文政七 – 天保三

1824 – 1832

46,723,072[6]

2 Shu

Tenpō

天保三 – 安政五

1832 – 1858

103,069,600[7]

2 Shu

Man'en

万延元 – 明治元

1860 – 1869

25,120,000[8]

### Silver[edit]

Denomination  | Era Namesake[a] | Japanese dates[b] | Gregorian dates[b] | Mintage

|
|
|
|

1 Shu

Bunsei

文政七二十 – 天保八

1829 – 1837

139,914,768[9]

1 Shu

Kaei

嘉永六 –

1853 – 1865

159,244,800[10]

1 Shu

Keiō[c]

慶應四 – 明治元

1868 – 1869

18,742,000[11]

2 Shu

Meiwa

明和九 – 文政七

1772 – 1824

47,464,336[12]

2 Shu

Bunsei

文政七 – 文政三十

1824 – 1830

60,624,280[13]

2 Shu

Ansei

– 安政六

– 1859

706,400[14]

## Notes[edit]

1. ^ a b Edo coinage is named after their era of origin regardless of how many eras their actual mintage spans.
2. ^ a b c d These years are for reference only as the given coins may not be dated
3. ^ Meiji era "1 Shu" coins are also known as "Kaheishi" 1 Shu.[11]

## References[edit]

1. ^ Osaka: Dillon's Report (1874). Report on the Third Anniversary of the Imperial Mint of Japan. Mint Dormitory.
2. ^ Reishi Aoyama (1982). Numismatic Handbook: History and Collection Guide to Japan Coins. Bonanza.
3. ^ Ryuzo Mikami (1996). The Monetary Story of Edo. Toyo Keizai Inc.
4. ^ Takeo Takizawa, Yasushi Nishiwaki (1999). Encyclopedia of Japanese History. Tokyodo Publishing.
5. ^ Reishi Aoyama (1982). New Edition: Numismatic Handbook: History and Collection Guide to Japan Coins. Bonanza. p. 104.
6. ^ "Japan Shu C# 17 (1824-32)". Numismatic Guaranty Company. Retrieved February 21, 2024.
7. ^ "Japan 2 Shu C# 18 (1832-58)". Numismatic Guaranty Company. Retrieved February 21, 2024.
8. ^ "Japan 2 Shu C# 18A (1860-69)". Numismatic Guaranty Company. Retrieved February 21, 2024.
9. ^ "Japan Shu C# 11 (1829-37)". Numismatic Guaranty Company. Retrieved February 21, 2024.
10. ^ "Japan Shu C# 12 (1853-65)". Numismatic Guaranty Company. Retrieved February 21, 2024.
11. ^ a b "Japan Shu C# 12a (1868-69)". Numismatic Guaranty Company. Retrieved February 21, 2024.
12. ^ "Japan 2 Shu C# 13 (1772-1824)". Numismatic Guaranty Company. Retrieved February 21, 2024.
13. ^ "Japan 2 Shu C# 13a (1824-30)". Numismatic Guaranty Company. Retrieved February 21, 2024.
14. ^ "Japan 2 Shu C# 15 -1859". Numismatic Guaranty Company. Retrieved February 21, 2024.

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