Source: Bank of Japan
Release: Japan Foreign Exchange Intervention
(+) numbers mean purchases of the USD (sell Yen), (-) numbers mean sales of USD (buy Yen). Unpublished data.
Copyright, 2016, Bank of Japan.
Bank of Japan, Japan Intervention: Japanese Bank purchases of USD against JPY [JPINTDUSDJPY], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/JPINTDUSDJPY, October 20, 2017.