Haboku sansui

The is a splashed-ink landscape painting on a hanging scroll. It was made by the Japanese artist Sesshū Tōyō in 1495, in the Muromachi period. The ink wash painting is a National Treasure of Japan and is held by the Tokyo National Museum.
 was a Zen Buddhist monk and painter. The work is a development of paintings made with , using dark and light shades on a silk or paper medium. The monochromatic style can result in artworks similar to calligraphy.
In spite of its title, the work is not one of but rather one of . In this style, the painter avoids strongly defined outlines, with shapes indicated by colour washes in lighter and darker tones. 
The work slowly reveals itself to the viewer. Emerging from the undefined forms is the suggestion of misty mountains in the background. In the foreground are cliffs and bushes, and the triangular roofline and sloping banner for a wine shop with vertical lines forming a fence. Below is indicated the flat surface of a body of water, with two people to the right in a rowing boat.
The scroll measures . It bears a dedicatory inscription by the artist, dating it to the middle of the third month in the fourth year of the Meiō era (that is, April or May 1495), when Sesshū was aged 76. It was presented to Sesshū's pupil Josui Sōen, at his request, as a physical demonstration that he had studied under Sesshū in Suō Province (now in Yamaguchi Prefecture). As an indication of the artistic heritage passed on to his pupil, Sesshū mentions that he has travelled to China where he studied the works of Li Zai and Zhang Yousheng, and studied in Japan with Tensho Shubun, who was a pupil of Taikō Josetsu. 
On his journey home to Engaku-ji in Kamakura, Josui Sōen stopped in Kyoto, where he asked six Zen monks from Gozan temples to add poems to the scroll. 
A similar work by Sesshū is held by the Cleveland Museum of Art, with another at the Idemitsu Museum of Arts in Tokyo.