noun
money lent at daily interest
Historical term for a high-interest loan where interest was calculated daily, often associated with Edo-period moneylending. The kanji 烏 (crow) may derive from the image of crows returning to their nests at dusk, suggesting the daily repayment cycle.
江戸時代には、烏金と呼ばれる日歩の高利貸しが存在した。
In the Edo period, there existed high-interest loans called karasugane, with daily interest.
「烏金」という言葉
The word karasugane is now only seen in historical documents.