Zen Buddhism is a school of Mahayana Buddhism that originated in China during the Tang dynasty as the Chan School.
The Chan School started in the 6th century AD onwards, becoming especially popular during the Tang and Song dynasties.
It later spread to Japan where it is known as Zen Buddhism.
Thus, it is not mentioned in The Tale of Genji which was composed in the 11th century AD.
Lwh@ Uji, Japan.
14 Nov 2023.