Isshukin

Japanese: 一朱金 - いっしゅきん

A square gold coin from the Edo period. It is worth 1/16th of a koban (small gold coin). It was issued in 1824 (Bunsei 7) with the aim of increasing government revenue. As it was of poor quality, it was not widely accepted and did not circulate for long, eventually being withdrawn from circulation in 1840 (Tenpo 11). This was one of the factors that led to the Edo Shogunate losing credibility. Note that among the Koshu gold coins minted by the Takeda clan of Kai during the Tenbun period (1532-1555), there was also a round ichishu gold coin. →Ichibu gold coin

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

江戸時代の四角形の金貨。小判１両の16分の１に当たる。1824年（文政７年）に財政収入の増加を目的にして発行。品位が劣っていたので，一般には悪評で長くは流通せず，1840年（天保11年）に通用停止。江戸幕府の信用を落とす一因となった。なお天文期（1532年―1555年）に甲斐武田氏が鋳造した甲州金のうちにも一朱金（円形）があった。→一分金

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