Combine 2 tbsp (30ml) of cane sugar and ginger in a jar (1qt). Add water, stirring to dissolve sugar.
Cover with a piece of waxed parchment paper and center lid on jar.
Let stand at room temperature for 7 days, adding 1tsp (5ml) of sugar and ginger every day, stirring to dissolve sugar and replacing waxed parchment paper every day.
On the fourth day, mixture would become bubbly. On the seventh day it's ready to use.
Chill throughly. Store in the refrigerator and use within 1 week. Strain before using.