This sake is named after and made for Keigetsu`s Mr. Matsumoto`s friend John. They are both wine lovers and during a toast with one of Mr. Matsumoto`s sake, John asked why there were no bubbles. With that comment, Mr. Matsumoto made a sparkling sake for his friend John. Mr. Matsumoto opted to add CO2 to create the bubbles, as he wished to have a crystal clear sake and avoid the natural sediment that results from bottle fermentation.