You know what other all-Japan fly-range world title match this was kind of reminiscent of, in a way? Kōhei Kōno vs. Koki Kameda, except a) this one was a much better styles clash and b) skill was able to this time tame will...if only barely.
It's up there, but I still lean Sor Rungvisai-Estrada or Usyk-Briedis at the moment, that might change closer to the end of the year though, it's definitely Top 5ish.
CBC are said to have been very happy with the viewing numbers and would like to do this again in the future .. A success all round!