You have it backwards. Low interest rates were a response to the deflationary spiral not the cause of it. Japan lowered interest rates to almost zero in an attempt to increase economic activity and get out of the deflationary spiral. Low interest rates make money worth less and tend to increase inflation.
Also it helped banks by allowing them to keep the bad loans on their books while paying almost nothing. The best action is to have a government board buy the loans, at a discounted rate, thus clearing the bad loans from the balance sheets of banks thus allowing them to restart lending. That was why the US bounced back from the 1987 liquidity crisis and why Japan suffered 12 years of stagnation when they failed to do this.
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