Remember all the hoopla about Japanese buying safety deposit boxes to hold cash in response to the Bank of Japan's decision to set negative rates? Here is the Wall Street Journal: Look no further than Japan’s hardware stores for a worrying new sign that consumers are hoarding cash--the opposite of what the Bank of Japan had hoped when it recently introduced negative interest rates. Signs are emerging of higher demand for safes—a place where the interest rate on cash is always zero, no matter what the central bank does. Well, three month's worth of data shows no evidence of unusual cash demand. As the chart below illustrates, the rate at which the Bank of Japan is printing the ¥10,000 note shows no discontinuity from its pre-negative rate rise. In fact, demand for the ¥10,000 is far below what it was in the 1990s, when interest rates were positive. I should remind readers that the Bank of Japan, like any central bank, doesn't determine the quantity of banknotes in circulati...