
It is said he finally was able to establish communication with the Other World.
The first example of this is the "Other World Crystal Radio Signal Receiver," otherwise known as the "Spirit Stone Radio".
The Spirit Stone Radio's "Spirit Stone" was a name his colleagues used later -- in Dr. Asou's research materials it is usually simply referred to as the "Crystal."
The principle of the crystal radio is that it utilizes the special wave detection property of crystal to pick up the appropriate band of wavelength. Asou focused on that fact that "stones" have been known from ancient times to carry occult properties.
If he could find a special "Crystal" he thought perhaps he would capture signals from the Other World.
It is said his experiment was a success and the records note that he was able to capture sound at a range outside that of normal broadcasting.
The documentation of the sounds have been lost, but Asou's associates left behind several testimonials saying they heard "words of the past" and "words of ghosts".
