Wash the ginger thoroughly, peel it, and slice thinly.
Place the sliced ginger in a pan and lightly stir-fry over medium heat to remove moisture.
Add rice syrup, sugar, and water to the pan and bring to a boil, then add the stir-fried ginger and simmer.
Simmer over low heat until it becomes thick, then spread it on a cooling rack to cool.
Coat the surface evenly with sugar.