The sad fact is a lot of the classic films I report on here cannot even be found in Japan let alone outside Japan. This probably isn't common knowledge so it comes as little surprise when I am asked, as happened recently, how someone who is not in Japan can get his hands on these golden oldies.
The most recent query had to do with History of Japanese Torture Punishment (日本拷問刑罰史), the 1964 film produced by Shintoho which is considered to be the first full-fledged SM film in Japan.
As far as I know, this film does not exist any longer. Perhaps Shintoho have a copy in a vault somewhere. Or maybe a lone print is slowly deteriorating in someone's attic. To my knowledge, this movie has not been released on tape or DVD.