Zheng Huangniu and Yushanzhu. Artist: Kano Naizen (Japanese, 1570-1616); Inscribed by Takuan Soho (1573-1645). Culture: Japan. Dimensions: Image (a): 44 in. × 18 11/16 in. (111.7 × 47.4 cm)Overall with mounting (a): 78 11/16 × 24 5/8 in. (199.8 × 62.6 cm)Overall with knobs (a): 78 11/16 × 26 9/16 in. (199.8 × 67.5 cm)Image (b): 44 1/16 × 18 11/16 in. (111.9 × 47.4 cm)Overall with mounting (b): 78 15/16 × 24 1/2 in. (200.5 × 62.3 cm)Overall with knobs (b): 78 15/16 × 26 9/16 in. (200.5 × 67.4 cm). Date: early 17th century.Zheng Huangniu, at right, and Yushanzhu, at left, were two legendary Chinese Chan (Japanese: Zen) monks often paired in Japanese painting beginning in the early Muromachi period. Zheng Huangniu (Japanese: Seiogyu), whose name means "Zheng of the Yellow Ox," is known for riding a yellow ox to which he attached various objects, such as water jars and books. As is common in later Japanese examples, here Zheng rides his ox backwards. Yushanzhu (Japanese: Ikuzanshu, "