(5) Kobaien Sumi Stick from the Yasutomo Sumi-Ink set, late 1900s - early 2000s, Art Materials Research and Study Center, National Gallery of Art, Washington, D.C.













(5) Kobaien Sumi Stick from the Yasutomo Sumi-Ink set, late 1900s - early 2000s, Art Materials Research and Study Center, National Gallery of Art, Washington, D.C.