type of illegal loan charging 10% interest every 10 days
《hanafuda》dealt hand consisting of 1-point cards and one single 10-point card
といちの金利で金を貸す違法業者がいる。
There are illegal operators who lend money at usurious interest rates.
といちの高利貸しに手を出してはいけない。
You must not resort to usurious loan sharks.
といちは法律で禁止されている金利だ。
The usurious rate of ten percent per ten days is an interest rate prohibited by law.