Shiruko is a traditional Japanese dessert consisting of sweet red bean soup, commonly made with azuki beans and sugar. It is often served with mochi, a glutinous rice cake, or shiratama dango, which are small rice flour dumplings. The dish has its origins in Japanese cuisine and is a popular winter dish, consumed for its warmth and comforting nature.

Shiruko can be found in two main variations: "anko shiruko" and "koshi-an shiruko." Anko shiruko uses 'tsubu-an,' which contains whole azuki beans, offering a coarser texture. Koshi-an shiruko is made with smooth red bean paste, free of bean skins, providing a silky texture. Both versions share the same sweet red bean flavor and are served warm.

Historically, the use of red beans in Japanese cuisine dates back centuries, with references found in ancient Japanese texts. Mochi has also been a staple in Japan for thousands of years, commonly used in religious and celebratory contexts. Shiruko, combining these ingredients, reflects the integration of traditional food items into a unified dish.

Shiruko is often enjoyed during the winter, as its warm, sweet nature suits the colder months. It is associated with Japanese New Year celebrations and festivals. In popular culture, it is sometimes served in traditional tea houses and is available canned or pre-packaged, making it more accessible as a convenient snack or dessert.

In addition to its role as a dessert, shiruko offers nutritional benefits, as azuki beans are a source of protein, fiber, and essential nutrients. The dish's popularity endures in Japan, maintaining its cultural significance and culinary appeal.