A Japanese Zen bathroom centers on a rough-hewn basalt ofuro and freestanding copper filler, set on polished concrete under a slatted cedar ceiling. Warm lime plaster walls glow with amber cove lighting as a timber lattice window frames mossy bamboo. A recessed niche lined in glossy deep-green tiles holds a ceramic vessel. Natural textures, spare lines, and a restrained palette create a meditative wabi-sabi retreat.