Collections of Japanese poems and prose the autor is unknown. Ise-monogatari vividly dipicts a court life where the romantic assignations in ancient Japan comes back.

Chapter46
Long time ago a man had a very good friend. Both men loved each other like they never wanted to be separated for a minute. When the friend had go to the other province , they parted with the deep sorrow. After some time a letter arrived.
"So long time has passed since I had seen you. I would feel sorrow , if I forget your existence. When two people are far apart ,they passed from their thoughts it seems to me"
It was so written , and the man sent this poem back to him.
I remember I'm always with your thought. I can envicage you coming to me.