medicinal drink made from plants steeped in mirin
A traditional Japanese health drink prepared by steeping medicinal herbs or plants in mirin (sweet cooking rice wine).
My grandmother makes medicinal mirin-steeped liquor every year using herbs from her garden.
Compound of 薬味 (yakumi, 'medicinal herbs/spices') + 酒 (shu, 'alcoholic drink'). The exact historical origin is uncertain, but it refers to a traditional preparation method.