Rhododendron indicum hanazono #1
Satsuki azalea, variety hanazono (kaho x kotobuki) meaning "flower garden" in Japanese.
See: https://www.azaleas.org/view-azalea/?id=6487
November 2021
This 35 years old pre-bonsai was ordered from Bonsaischule Wenddorf in Germany. It was originally imported from Japan.