>>514904674
Emperor Hirohito specifically was reluctant to actually use Japan's bioweapons because he was a trained microbiologist and feared the diseases eventually coming back to Japan and opening a horrible new style of warfare.

One of the diseases Japan was threatening the US with was Lyme Disease, which was given over to the CIA as part of the peace agreement. It was sent to Fort Deitrick for study and later to Plum Island, New York, where experiments were stupidly done on cattle in the open air pens (you can still see the remains of the pens on Google Earth today). A tick likely jumped on a seabird who was possibly feeding in the pens and the rest is history.

This is why Doctors were told not to diagnose cases of Lyme Disease, the government (still) doesn't want the public to know that they incompetently plagued the US with a confiscated Japanese bioweapon. The Fu-go incendiary bombs were just range tests, the live version would contain things like lyme-carrying ticks