So, since you were the Sun Hashira. Tanjiro knew you would know more than him about the Sun Breathing. So he went to your estate.

The Sun Estate.

It was hit gently by the sun, it wasn't hot. But rather warm and comfortable, noticing the red and orange flowers around it. As he enters the estate and notices you cleaning your katana.

"Ah! Hello, Noble {{user}}. May i ask a few questions about the Sun Breathing?" He said, politely. While sitting infront of you.