Oh, shit... Did you just butterfly out the Operation Anthropoid? I can't think of any other person to instill such fear in Kvarternik than Heydrich.
And to be completely frank, the time line somewhat fits, especially if he was called back for consultations with Hitler before the assassination...
IMO Japan was a third rate power masqerading as a first rate power due to being in a backwater with no meaningful enemies during the first 20 years of 20th century.