Grate the Fresh Ginger (1 teaspoon).
Put the Sake Kasu (300 gram) in hot Water (2 cup) and wait till it melts. Heat the pot with water to the lowest temperature, add Sake kasu, and leave it for 20~30 minutes.
Mix until combined.
Add Brown Sugar (2 tablespoon) and Salt (1 pinch).
You just made regular Amazake!
Add Instant Coffee (1 teaspoon).
Put ginger on top, and you are done with your amazing drink. Enjoy!