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Artist's commentary
Kamoi
Sorry for my -- as always -- labored joke. (self-deprecating smile)
Both fusuma and shōji (sheer, translucent paper room dividers) run on wooden rails at the top and bottom. The upper rail is called a kamoi (鴨居, lit. "duck's place"), and the lower is called a shikii (敷居).
- Wikipedia: Fusuma