I have some notes or something with minor spoilers.
Episode 119: Torrent
I don’t remember if I said this last time, but maiko (from Miyabi’s song) are apprentice geisha (there’s a good book on this which I can’t recall the name of because it’s 4 am and I just spent many hours watching the Nico livestream of Wonfes). Johnny says a lot of words, the first three of which are shrines/temples in Kyoto and the fourth of which is a Kyoto specialty [food]. Miyabi makes a pun at the end of the episode アイカツの道 Aikatsu no michi (Aikatsu path/way/road) and then changes it to アイドル道 aidoru-dou. This is how many martial arts are written such as judo and kyuudou (differences in spelling due to silly romanization practices). Kagura is explained in the episode, but the story afterwards about the goddess in the cave is from the Japan origin story of Amaterasu. Perhaps you’re familiar with it from anime or the game Okami. I think that’s it.