A name-etymology / chekhov-explicit seed: Oda hands his food-named hero (“Oden” = the boiled hot-pot dish) a death sentence that is literally a boiling pot, in front of the city — telegraphing a grim, namesake-encoded set-piece. The negative space (how the boiling execution plays out) is the whole point. Cross-links Kozuki Oden (the name-pun source), Orochi (the sentencing authority), Akazaya Nine.
Sources
おでん (oden) = the boiled winter hot-pot dish; the man’s name is written identically to the dish (おでん); the boiling execution + “born to boil” catchphrase as the deliberate name↔death pun, and the one-hour bargain matching oden’s cooking time: https://flavor365.com/what-were-odens-last-words-a-deep-dive-into-the-legend/
Oden’s food namesake / Kozuki family food-naming theme (SBS Vol. 96 — “National Oden Day”): see Kozuki Oden etymology.