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1 Mon 'Nyōyakushinpō'
| Issuer | Japan |
|---|---|
| Year | 859-870 |
| Type | Log in to see details |
| Value | 1 Mon |
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| Composition | Log in to see details |
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| Diameter | Log in to see details |
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| Obverse description | Four Chinese characters in regular script (kaishu) are arranged symmetrically around a raised square central hole boss, reading clockwise from the top: 饒 (top), 益 (right), 神 (bottom), 寳 (left), forming the legend 饒益神寳 (Nyōyakushinpō, meaning 'Divine treasure of abundant profit'). The characters are rendered in relief within the inner field, bounded by a raised square rim enclosing the central perforation and a plain outer rim. The flat field between the square boss and the outer rim shows no additional ornamentation. Known variant types exhibit differences in character size and the positional relationship of individual characters to the outer and inner rims. The coin is also referred to in numismatic literature as Nyōekishinpō and Jōekishinpō. |
|---|---|
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| Obverse lettering | Log in to see details |
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| Mintage | ND (859-870) - DHJ# 1.50; large size and characters - ND (859-870) - DHJ# 1.51; small size, top of 饒 touches outer rim - ND (859-870) - DHJ# 1.52; small size, 神 to the right of hole - |
| Additional information |
The Jōgan Eirihō, struck between 859 and 870 under Emperor Seiwa, was the fifth of Japan's Twelve Ancient Coins — the Kōchōjūnisen — issued by the Ritsuryō state in its attempts to establish a functioning copper coin economy. That project was failing by this point. Peasants hoarded coins, court officials accepted them only under compulsion, and the government repeatedly had to mandate their use by law. The Nyōyakushinpō is among the later, increasingly debased issues in that sequence, and official minting effectively collapsed within decades of this coin's production.