Great fun, a typical good pulp game and another enjoyable read. Hopefully you can keep this momentum going because the girls are on a roll and I'm enjoying reading off their escapades.
The buildings you are using, wood frame and thatched roofs with battens holding the thatch down. Are they typical for a period and or region or fairly generic in Japan over a period covering hundreds of years. I ask because they don't have chimneys and was wondering when and if they started to be used.
I'm assuming they are thatch but I suppose they could be thin sips of wood!
Cheers
The buildings are from Oshiro Models and are pretty generic Japanese houses that remained the same over centuries. The roofs are wood but have a lot of detail, which is why it looks like that. What you find in the late 19th century is that a pot-belly stove would be installed in the house and a pipe would lead out the side and point up. I'll share some examples from Hokkaido, which has a similar climate to the American Midwest and Germany.

This is a reconstructed guards' quarters inside the old Abashiri Prison and represents what the quarters would have been like in the early 20th century.


Akiyama Family Fisherman's House (1920)
Kaitaku no Mura, Sapporo, Hokkaido Pref.

Oishi Sweets Shop (1907)
Kaitaku no Mura, Sapporo, Hokkaido Pref.


This is a woodcutter's shanty built around 1920, it shows an alternative sort of ventilation with raised section of roof over the fire pits inside.
Kaitaku no Mura, Sapporo, Hokkaido Pref.