NAMAKO KABE なまこ壁 is a sort of soil wall, KAWARA 瓦 is attached on it's surface.
White stucco is attached as a joint of each Kawara, the stucco is shaped in semicircular shape.
The wall has better fire proof and water proof performance than usual soil wall.
It was used for a samurai residence in Edo-era 江戸時代 (1603-1868) at first, then it was spread into ordinary houses.
We can see Namako wall cityscape in Shimoda (静岡県下田市) and Kurashiki(岡山県倉敷市) even today.
* Kurashiki, Okayama, Japan