Azuki Bean Soup Recipe: Sweet and Savory Japanese Comfort in One Pot

This azuki bean soup recipe delivers the warm, comforting flavors of Japan’s most beloved sweet-savory staple in a single pot. 💛 The secret lies in slow-simmered red beans—naturally sweetened by just a touch of sugar—while a light broth balances earthy depth and tender texture.

I’ve perfected this version to stay true to tradition while adapting for modern kitchens, where soaking time is simplified and flavor builds effortlessly. What makes this recipe special is its versatility: serve it as a light vegetarian meal, a nourishing breakfast, or a dessert-like treat with a drizzle of honey.

The beans soften into velvety perfection, releasing their natural sugars as they simmer, while optional ingredients like tofu, mushrooms, or scallions add layers of texture and aroma. It’s the kind of dish that feels both familiar and elevated—perfect for cozy nights or special occasions.

The process is straightforward but rewarding: soak the beans overnight (or use canned for convenience), simmer until tender, and adjust the broth to your preference.

Whether you follow the classic Japanese ankake style or add your own twist, the result is always satisfying—a harmonious blend of sweet, savory, and umami that warms both body and soul. This is comfort food at its finest, made even better by how easy it is to achieve.

Best of all, it scales effortlessly for gatherings or meal prep. The leftovers taste even richer the next day, making it a staple for busy weeks. Let’s get started on creating your own bowl of Japanese-inspired warmth.

Ingredients for azuki soup

These 13 ingredients transform into velvety azuki bean soup—naturally sweet, deeply savory, and effortlessly comforting.

The azuki beans are the heart of this soup, so choose them carefully. Japanese red beans from Asian markets have the richest flavor, but any dried azuki will work. Rinse them thoroughly before soaking to remove debris—this prevents cloudy soup later. For convenience, canned azuki beans save time, though they lack the depth of homemade. The shiitake mushrooms add earthy umami; dried shiitake from bulk bins at Whole Foods or Trader Joe's are ideal—they’re cheaper and more flavorful than fresh. Toast the sesame seeds lightly in a dry pan for 30 seconds—they’ll add nutty aroma to every spoonful.

No mirin? Substitute 1 tbsp honey plus 1 tbsp water—it won’t be identical, but it’ll work. Running short on sake? Dry white wine or extra mirin keeps the balance. For a vegetarian twist, skip the bonito flakes entirely—the kombu alone provides enough umami. The green onions can be swapped for scallions or chives, but the white parts are key for broth flavor. If you’re using canned beans, drain and rinse them well to avoid a starchy texture. The tofu can be omitted if you prefer a lighter soup, but it adds satisfying protein and silky texture.

This soup tastes even better the next day as flavors meld. Store leftovers in an airtight container in the fridge for up to 5 days, or freeze for 3 months in portioned containers. Reheat gently on the stove with a splash of water to restore creaminess. For meal prep, double the batch—it reheats beautifully and makes lunches effortless. The honey drizzle is optional but adds a delicate finish; agave nectar works too if you prefer a vegan touch.

Step-by-step instructions for azuki bean soup

Here's how to craft this soul-warming Japanese classic with perfect balance between sweet and savory notes.

Start by rinsing the 1.5 cups dried azuki beans under cold water until the water runs clear. Place them in a large pot with 6 cups water and bring to a boil over high heat. Once boiling, reduce to medium-low heat and simmer uncovered for 1 hour. You'll notice the beans soften but won't fully cook—they need to finish in the soup.

While the beans simmer, prepare the 4 whole dried shiitake mushrooms by soaking them in 2 cups hot water for 30 minutes. This rehydration process plumps them up and intensifies their umami flavor. The 1 piece dried kombu seaweed can be added directly to the bean broth during the final 10 minutes of cooking—it'll infuse the soup with subtle oceanic depth without overpowering.

After the beans have simmered for 1 hour, add the 2 tbsp soy sauce, 2 tbsp mirin, 1 tbsp sake, and 2 tbsp granulated sugar to the pot. Stir gently to combine—this is where the magic happens as the sweet and savory flavors begin to meld. The kombu seaweed should be added now, too, and allowed to steep for those final 10 minutes of cooking.

I like to taste the broth at this stage to adjust the balance. If it needs more sweetness, add a touch more sugar. If it's too flat, a splash of sake or extra soy sauce can deepen the flavor. The goal is that perfect harmony where you can't decide if it's sweet or savory—it's both.

Remove the kombu seaweed and discard it after 10 minutes of steeping. Drain the rehydrated shiitake mushrooms, reserving ½ cup of their soaking liquid—this liquid is packed with mushroom flavor. Slice the mushrooms and add them to the pot along with the 8 oz silken tofu cut into small cubes. Simmer gently for 15 minutes to allow the flavors to meld completely.

The silken tofu will absorb some of the broth, becoming tender and infused with all those beautiful flavors. If the soup seems too thick at this point, add ½ cup water to reach your desired consistency. The mushrooms should be tender but still hold their shape—don't overcook them or they'll turn mushy.

Turn off the heat and stir in the 4 whole green onions, sliced into ½-inch pieces (white and green parts separated). The white parts will add subtle onion flavor while the green tops provide freshness and color. Let the soup sit off the heat for 5 minutes to allow all the components to absorb each other's flavors.

For serving, ladle the hot soup into bowls and drizzle with a touch of 1 tbsp honey and sprinkle with 1 tbsp toasted sesame seeds. The honey adds a final touch of sweetness that complements the savory depth, while the sesame seeds provide texture and aroma. For an extra umami kick, sprinkle with 1 tbsp dried bonito flakes just before serving—they'll sizzle slightly from the heat of the soup.

Let the soup rest for 5-10 minutes before serving. This resting period allows all the flavors to truly meld together, creating that perfect balance that makes this soup so comforting. The beans should be tender but still hold their shape, and the broth should coat the back of a spoon with a silky texture.

Serve immediately with steamed rice on the side—each bite should deliver that perfect harmony of sweet and savory with every spoonful. The combination of earthy mushrooms, creamy tofu, and tender beans creates a texture that's both satisfying and comforting, while the subtle sweetness balances the umami depth perfectly.

Regional styles of this dish

Japanese Ankake

This classic version from Kyoto focuses on the natural sweetness of azuki beans with minimal additions. The key difference is using dashi stock instead of kombu, and omitting tofu for a lighter texture.

I like to add ½ cup mochi rice during the final 10 minutes of cooking for a subtle chewy contrast. Serve with wagashi (Japanese sweets) for a traditional tea ceremony pairing. 🍵

Korean Kongguksu

In Korea, azuki beans take center stage in kongguksu, a sweet-savory soup often served during Chuseok harvest celebrations. The broth here is lighter, using 1 cup anchovy broth instead of soy-mirin.

Add 1 tsp gochugaru (Korean chili flakes)> for subtle heat, and garnish with thinly sliced pear for natural sweetness. The texture is thinner than Japanese versions, almost like a light stew. 🌶️