National Treasures & Important Cultural Properties
of National Institutes for Cultural Heritage, Japan

The suiboku sansuiga (landscape paintings in sumi ink) style, which was handed down from Beifutsu, a bunjin (a literary man) in the end of the Northern Song period, to his son Beiyujin in the early Southern Song period, has been called Beikazan or Beihosansui. Today, however, the painting style called Beihosansui is believed to have been established as one form of the sansuiga style by Ko Kokukyo, a bunjin painter from the end of the Yuan period to the early Ming period. This painting is known as a high quality piece of Beihosansui from the end of the Yuan period to the early Ming period. The name "Rigo-sansuizu (a set of two paintings that are physically separated, but have something in common)" derives from the fact that the designs of the two pictures are connected.