Be sure to share any insight she has on the subject & check-out the NHK documentary (linked-to in the source tag of the pictures), it looks at the tokonoma in a traditional Tea House, as a place of prayer, and in a modern art setting...
Author, Artist, Lecturer in Creative Arts & Media. ‘This, That, and The Other’ fantasy novels published by The Red Sparrow Press. https://linktr.ee/remydean