When does my little tea house tryst happen? Around a hundred years after the fall of the Minomoto dynasty, I figure about 1185 AD.
A tea house? Tea houses had not been invented in 1185. Partly because tea had not been invented.
The Japanese were just learning about tea from China, and it was regarded as an aphrodisiac (as what has not?) and reserved for males only of the highest rank. The Emperor or local feudal lords might indulge in a cup to put some wood in their ink brush before visiting their consorts, but not a woman, much less of mid level rank such as Lady Dainagon. And with a impoverished Biwa-Hoshi? Not in your dreams, gai-jin san. For a woman of even so-so rank, a peripheral member of the Imperial family in a backwater place, to be left alone in the company of someone regarded as below common would be scandalous. . (Aie-ya! Oushikuso!) Impossible. It would like Princess Diana inviting a homeless man to spend the night in her room. It will not do. So how would they meet if this thing were done right?
Or as a Kindle book at Amazon:
If you're curious about Lady Dainogon before the events of The Color of the Moon, this week at the Oh Get a Grip blog, where the theme is "Fairy Tales", I've composed a Japanese fairy tale in which she appears with ladies of the court , back in better days: