From what I can tell -- given my non-existent Japanese language skills -- is a lot of Japanese military radar documents seem to have gone the way of signals/intelligence documents between the Japanese surrender and occupation.
Thanks! I'm confused, though. I thought we were talking about the neglect by professional military historians? I.E., from your original comment:
The absolute avoidance of STEM related subjects, like radar by professional military historians of WW2, is a sore point for me in that regard.