Aizu Matsudaira's Royal Garden is a medicinal herb garden in the city of Aizuwakamatsu, Fukushima Prefecture, Japan. The garden was first established in the 1380s. In the 1430s Ashina Morihisa, the 10th feudal lord of the Ashina clan, believing it to be a sacred place, kept the garden as a villa. In 1670, Matsudaira Masatsune, the second feudal lord of the Aizu fief, cultivated various herbs in the garden.