This Japanese government propaganda to make me go outside and enjoy life almost didn’t work, even with this… but then they brought out the s’mores. That’s impossible to resist.
A lot of this episode felt like something out of a fever dream. Anyway, there are two things that beg mentioning. First is about houtou, a form of udon. You can look it up for yourself in that link there, but the reason that Takeda Shingen keeps appearing in the background is because legend says that he invented it. Second is a weird thing that Rin keeps saying, the wasei-eigo “match pump”. Basically it means “to stir up trouble to get credit for the solution”, and comes from “lighting a match and then putting it out with a water pump“. I have no idea where they possibly got this from.
Wow, not only was this a sign-heavy episode, but also a note-heavy one! I’m just going to go through them in no particular order.
Yukichi is the guy on the 10,000 yen bill. If it were in America, the joke would be Benjamins.
Oshikura manju is this goofy Japanese kids “game” where they link arms in a circle back-to-back and push in and out. The movement is supposed to heat you up. See also: Maho Girls
Kanpu masatsu is that thing where you rub a dry towel quickly over your body to heat it up. You can probably visualize a wrinkly naked old man doing it if you’ve seen enough anime.
Hottokeya is a pun (or not) that sort of combines the word “hot” with the verb “to leave alone”, so it’s as if the person in the hot spring is telling others to let them be.
The flag on the moon is a total parody of Potepo from Aikatsu. Don’t try to convince me otherwise.