- Premiered in Japan on January 25, 1969, and made it to the US three months later.
- The actress/actor playing mother and son in this film are in reality only a year apart.
- Remade in Japan in 2001.
This one seems not often reviewd by film bloggers, but a few to check out would be:
- Midnight Eye (2001)
- Original New York Times review from 1974.
- Gore Girls Dungeon (2012)–lots of stills, so you can see what you’re in for. (“The breast wall?”)