Two days after Japanese yields plummeted on January 29, when the BOJ unexpectedly stunned the world by announcing negative interest rates, the Japanese government sold 10 Year Bonds at what was then a near record low yield of 0.078% in an auction which carried a 0.3% coupon. Since then things have only gotten more… deflationary, and as can be seen on the chart below, as of this moment the 10Y JGB is yielding a record-0.055%