btw, I took your advice and watched
Onsen Suppon Geisha (1972). Not exactly my type of film but I enjoyed it. Silly but fun, high WTF factor, lots of cameos. Since it was a double feature I decided to stay for
Onsen Mimizu Geisha (1971) as well, which was weaker but still ok. It was fun to see Reiko Ike acting almost like an idol and running topless on the beach. I recall there being a rumor she was underage when they filmed it, but I'm not sure if it's true. Looking at the dates, they had a few week windown to film and get it ready, which by the standard of that era could just be enough. If she was underage, we're talking about weeks or days.
What made the double feature pretty awesome was the theater. I had not been to Shin Bungeiza before so I wasn't expecting a 10 metre screen!!! What a pleasure seeing early 70's smut on a screen of that size! And not only that, the theater was completely packed! 266 seats I could count the empty seats with my fingers minutes before the film started! It probably had something to do with screenwriter Masahiro Kakefuda talk event being held after Onsen Mimizu Geisha, but still! Unfortunately I didn't have time to stay for that.
Here's a picture of the theater, taken on the previous night when there was far less audience:
On that day I watched
Dolls of the Shogun's Harem (1986) and
Ninja's Mark (1968). I need to write more about Ninja's Mark later when I have time. Let's just say it has a scene where a ninja turns a woman into a fish while she's having sex...