This Japanese idol has the last name of Soma.

Soma was a ritual beverage of importance among the ancient  Indo-Iranians, and the Vedic as well as greater Persian societies. It is often mentioned in the Rigveda, of India, whose Soma Mandala illustrates hymns which praise its energizing qualities. 

Soma, so we are told, is prepared by distilling juice from the stalks of a particular plant. In both Vedic and Zoroastrian religions, the drink is not only identified with the plant, but also personified as a divinity, the three thus creating a religious or mythological unity.

The identity of the first soma plant was most likely ephedra, however there are other possible suggestions, such as Amanita muscaria and other mushrooms.