A reduction in its purchases in the 10 to 25 years remaining until maturity window.
160bn yen compared with 180bn last time around.
The last time the BOJ did similar was about 8 weeks ago.
Also a smaller purchase amount in 25 - 40 year window. 40bn yen vs. 50bn previous.
When the BOJ first reduced buying like this we saw a knee jerk yen strengthen, the reaction has diminished when they have done so recently though.
