My next door neighbour lives in one of those thatched roof houses. I once visited in mid May, it was sweltering hot outside so I was in Tshirts and shorts. Inside, it was freezing! They had the kotatsu and a kerosene stove on.
That's a feature these days!
You can still see a few of these houses and their traditional gardens in some of the wealthy, old-money smelling parts of Kyoto.