If you have not seen it yet, the NHK World documentary “Sesshu’s World of Zen in Ink” can be seen here:

“Sesshu is called the father of Japanese ink painting. German-born Muho Noelke, a Zen abbot in Japan, visits Yamaguchi Prefecture in western Japan, a city that changed Sesshu’s life. Here, Sesshu escaped Kyoto’s culture of copying Chinese ink paintings and searched for his own style of expression. His works embody the Zen tenets and aesthetics that prevailed during the samurai age in which he lived. What he learned he imparted to his disciples. Even today they hold new discoveries.”