An explicit clock on the raid: the fire/armory/island-drop must be resolved before catastrophe. The seed is planted here; the payoff develops forward (anti-spoiler: do NOT resolve in this window — window.hi = 1037).
Earliest known caller
(Not yet attributed.)
Why this matters
A dense chekhov-explicit / prop-tell stack: a dying villain’s last theatrical act (the Kazenbo flame) is planted in the same beats as the hidden weapons cache and the descending fortress, so a single prop becomes the detonator for the whole raid’s endgame. Likely also pays off Kanjuro’s long-established “drawings come to life” power . Cross-link New Onigashima Project, Kurozumi, Orochi.
Name etymology — the name is itself a seed (technique/name-etymology)
Notes
Name-etymology pass : added the 火前坊-yokai layer — the name itself encodes the un-extinguishable-fire seed. See etymology: frontmatter + the Name etymology section above; tagged technique/name-etymology.