Often the kakemono used for this will bear calligraphy of a Zen phrase in the hand of a distinguished Zen master.
From the en.wikipedia.org
Kakemono also refers to hanging scroll paintings.
From the en.wikipedia.org
As opposed to makimono, which are meant to be unrolled laterally on a flat surface, a kakemono is intended to be hung against a wall as part of the interior decoration of a room.
From the en.wikipedia.org
When displayed in a chashitsu, or teahouse for the traditional tea ceremony, the choice of the kakemono and its complementary flower arrangement help set the spiritual mood of the ceremony.
From the en.wikipedia.org
The kakemono was introduced to Japan during the Heian period, primarily for displaying Buddhist images for religious veneration, or as a vehicle to display calligraphy or poetry.