There is a film of Sokaku. It is held by one branch of Daito ryu. Sagawa offered a huge amount of money for it.
It was filmed at Asahi dojo.
Too bad I'm not one of the $550 million dollar winners, otherwise I would have let the cat out of the bag...I'm doing exactly what Takeda, Sagawa, Horikawa are doing...!!! ;0)
PS It would have been grand new dojos for everyone...!!!