The name “Princess Michiko” in this sake is full of meaning. It is the name of the rose presented to the then Heisei Crown Princess Michiko (Heisei Empress, now Empress of Japan) by the United Kingdom in 1966.
In the last year of Heisei Era (2019), Tokyo Agricultural University used the isolated flower yeast of the Princess Michiko Rose to brew this commemorative sake in honour of the memories brought by the Heisei Era to Japan.