Here is some good info the Japanese secret weapon (The airborne ones..)
j-aircraft.org...
The Mitsubishi J8M Shusui - Me 163 copy
The Nakajima Kikka - Well about this we knew allready
The Yokosuka MXY7 Ohka Model 22, Model 33, Model 43 series, and Model 53 - A new info allso about Ohka trainer
The Kawasaki Ki-64 - With contra-rotating propellers.. this allso flew..
The Mitsubishi Ki-67 Hiryu Variants - One of these was to have HUGE shaped charge for KAMIKAZE missions..
Guided Missiles of the IJA and IJN - Some good info on these allso..