Shiruko (Azuki Soup) is a warm and sweet food (drink) commonly consumed in Japan during the winter.

It's a dish where sweetened, pureed adzuki beans are cooked until thick and syrupy, then served with mochi or shiratama dango. Although it looks like a soup, it's a heartwarming dish due to the rich, liquid azuki beans.

Shiruko is sometimes called Zenzai. In this case, when smooth, no-grain koshian (paste-like red bean) is used, it's referred to as 'oshiruko', while when chunky tsubuan (intentionally leaving bean shapes and textures) is used, it's known as 'zenzai'.