Raw ingredients: Malted grain must always be used, but other cereal grains can also be included.

Water: Water used in production must be extracted in Japan.

Production: Saccharification, fermentation and distillation must be carried out at a distillery in Japan.

Distillation: Must be distilled to less than 95% ABV.

Aging: Spirit must be aged in Japan in wooden casks for a minimum of three years.

Packaging: Bottling must take place in Japan.

Strength: Bottled spirit must be at least 40% ABV.

Coloring: Plain caramel coloring (unflavored) can be used.