I never knew Hokusai had interest in these.
Does anyone know if he had seen any Islamic tiling art ? Or for that matter if Escher had seen any of his.
Group theory / symmetry runs deep through these. One [0] of the circular ones made me think of braid(group)s. Not sure what the * operator would be in that case.
Speaking of braid groups Richeson had a very interesting blog post on the braid like groups of maypole dances.
Let me find and submit separately (spoiling a Hokusai story with another story, no matter how interesting, would be a personal sacrilege). Found it [1][2].
[0] https://dl.ndl.go.jp/pid/1899550/1/10/
[1]https://news.ycombinator.com/item?id=44225324
[2]https://divisbyzero.com/2009/05/04/the-maypole-braid-group/
About halfway through there is a pattern depicting birds behind a chain link fence that he did possibly the same year the chain link fence was invented in the United Kingdom.
So Banksy of his time to do that.