Sedge Hats on a Lattice, Mulberry paper (kozo washi) treated with fermented persimmon tannin (kakishibu), and silk threads (itoire), Kasa hats refer to various styles of traditional Japanese straw hats. Samurai helmets were often painted in black and or red. Black differentiated the low-class samurai warriors. These kasa hats are tattered on top of a lattice weave pattern. Silk threads are added to support the stencil structure., Japan, 1780-1830, textile designs, Katagami, Katagami