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1 Shu 'Kōshū Isshukin'
| Issuer | Kai Province |
|---|---|
| Year | 1650 |
| Type | Log in to see details |
| Value | Isshu Kin (1⁄16) |
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| Composition | Log in to see details |
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| Obverse description | Log in to see details |
|---|---|
| Obverse script | Japanese (Kanji) |
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| Reverse description | Plain hammered gold field bearing two rectangular cartouche-style stamp impressions arranged vertically at center. The upper stamp, set within a circular punch, contains the character '今' (ima/kin, meaning 'now' or an official guarantor's mark), while the lower stamp, set within an oval or arched cartouche, bears the character '宝' (takara, meaning 'treasure'), serving as authenticating assay or authority marks. The surface shows typical file marks and irregular edges consistent with hand-hammered provincial gold coinage. |
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| Additional information |
Kōshū Isshukin — "Kai Province one-shu gold" — were emergency issues produced in Kai, the former domain of the Takeda clan, using locally sourced gold from the famously rich Kurokawa and Yuzuruha mines. The Tokugawa shogunate had not yet fully consolidated its national coinage system in the mid-seventeenth century, and provincial gold pieces like this one filled the gap.
These were eventually absorbed and demonetized as the Edo monetary framework tightened, making surviving examples products of a window that closed quickly.