If you actually READ the article I posted, you wouldn’t have asked that.
Two must reads - what was there and the prior warning for the Japanese - http://avalon.law.yale.edu/20th_century/mp06.asphttp://avalon.law.yale.edu/20th_century/mp06.asp
https://www.cia.gov/library/center-for-the-study-of-inthttps://www.cia.gov/library/center-for-the-study-of-intelligence/csi-publications/csi-studies/studies/vol46no3/article07.htmlelligence/csi-publications/csi-studies/studies/vol46no3/article07.html