Rosemary, et al.
I haven't seen the Astrorama footage yet so I can't say anything specific, but there are a few general things to say about this. One is that it is pretty clear that Hijikata recycled ideas across performance genres and that this recycling could stretch over fairly large points in time. If you had time to look at all 10 thousand photos in the arts center, one interesting thing is to linger over the photos of Space Capsule, or Art Village (which are the shows that are closer to the burlesque side of HIjikata's output) and see poses, and movements that were also used in the more "high art" avant-garde performances. So the burlesque shows could serve as idea labs for something that will make it into a dance later, or vice versa. And you are all probably aware of the footage from the various Ishii Teruo movies that Hijikata appeared in that matches up with what was going on in the dances as well. So HIjikata was clearly using in one place stuff he had already choreographed for another purpose. In that sense, each of these records can open up understanding of a different dance.
Obviously, with the appearances in cinema, a director is asking Hijikata for something that fits within a larger project, so its not clear the extent to which we can see clips from a movie as directly related to what Hijikata staged when he was the one with the directorial control.
In the usual histories of Hijikata, (echoed by me even at UCLA), you have the early crazy stuff and then the later Hijikata method/butofu stuff and one question is where to draw the line between the two. But Schwellinger notes that even in Nikutai no hanran in 68, Hijikata is doing something himself that looks like what he is teaching Tamano later in rehearsal in 1972. We have no way of knowing from the outside whether Hijikata was already applying mental adjustments to his own movements in 1968, but Ashikawa had already been at Asbestos Hall for over a year by then and the other standard line in Hijikata histories is that Ashikawa was particularly receptive and thus good at taking instructions from Hijikata and that the two spent a lot of time together developing new methods. Until, someone can find a way to get an interview of Ashikawa, its going to be hard to pin down the question of when we should date the shift, but my hunch (and at the moment it is no more than a hunch) is that Schwellinger's observation coupled with Ashikawa's entrance to Asbestos-kan makes it so we can push the date of the shift earlier rather than later. The art center archive is sitting on footage of Gibasa from sometime Oct.-Dec 1970 that is the precoursor to Gibasan in 1972 (on the same 27 Nights program as Hosotan), but has chosen not to focus on that footage, so we have to ask, what sort of story does the archive want to tell about Hijikata that makes Astrorama something you focus on, while you don't focus on Gibasa. (Incidentally, the archive also has Aug 28-Sept. 1, 1970 footage of Fountain Hall which clearly looks a lot like Rose-colored Dance, so I don't want to make it seem like there is a big break here. But Fountain Hall is clearly men and Gibasa is clearly the women, so even if 1970 is indeed a transition period, its a gendered transition. And clearly, the fact that its Hijikata himself dancing in Astrorama makes that attractive footage if the through narrative you want to tell has to do with Hijikata's internal state of mind.