How do tatami rooms work? I am conducting research for a writing project featuring feudal Japan.

Hey guys! I have been trying to incorporate a good visual in my writing for a normal storage closet in a Japanese shrine, and I have ran into some problems trying to figure out how to describe a small tatami room. The main issue is that I cant seem to figure out if a shoji door could be considered a window? I just dont know how I could put it in and introduce the blue skies and sunny day that way since I want to show an open shoji door into the outside world and those features. It doesnt seem right to use the basic window term from modern houses though.

Is my idea accurate to life? Some advice would be helpful! Thank you!