Chef Takumi
Asari Misoshiru (あさりの味噌汁, manila clam miso soup)
The clams make their own dashi in this spring miso soup. Purge the sand well, open them gently, then whisk in miso off the heat so the broth stays clean.
Culinary Explorer
A cooking platform built around craft, culture, and the stories behind what we eat.
Akadashi (赤だし, Nagoya red-miso soup)
Created by
Akadashi asks you to trust the dark miso. Build a clear dashi, loosen the Hatchō mame-miso gently, and the soup turns coffee-dark, savory, and clean.
Soups & Stews
Japanese
Weeknight
Comfort Food
Dinner Party
15 min
Active Time
25 min cook•40 min total
Yield4 servings
Akadashi is the miso soup that makes nervous cooks reach for a smaller spoon. It looks too dark, almost black in the bowl, and the first taste carries a bitter edge. That's not a flaw. Hatchō mame-miso is soybeans, salt, water, and time, pressed under stones through two summers until it becomes coffee-dark and strong enough to stand beside grilled eel, fried pork, and rice without blinking.
The dish isn't difficult. It only refuses to be treated like pale miso soup. Make a clean ichiban dashi, first stock, from konbu and katsuobushi, then loosen the miso in a ladle or miso koshi before it enters the pot. Hatchō miso is dense and stubborn; if you drop it in whole, you'll chase little lumps around like a scholar who has lost his spectacles. Mash it smooth first and the soup turns even, deep, and calm.
The detail that decides it is heat. The dashi may simmer to warm the tofu and nameko, but once the miso is in, the soup must not boil. Boiling drives off the aroma, sharpens the bitterness, and muddies the clean stock you took the trouble to make. Warm it, taste it, serve it. In the method, not the menu, this is a small soup with a serious backbone.
Hatchō miso takes its name from Hatchō, a district of Okazaki in Aichi Prefecture said to lie eight chō, roughly 870 meters, from Okazaki Castle. By the Edo period, makers there were fermenting soybean miso in great cedar vats weighted with river stones, a method still associated with firms such as Kakukyu, whose origins are traced to 1645. Akadashi spread as the red-miso soup of the Tōkai region, especially Nagoya, though outside Aichi the word often means a blend of Hatchō-style mame-miso and lighter rice miso.
The technique, the tradition, and the story behind every dish.
Discover Culinary ExplorerIngredients
konbu (dried kelp)
Quantity
1 piece (about 10g)
cold water
Quantity
4 1/2 cups
katsuobushi (dried bonito flakes)
Quantity
20g
dried shiitake (optional)
Quantity
4
for meatless shōjin dashi
nameko mushrooms
Quantity
120g
trimmed if fresh, briefly rinsed if packaged
firm tofu
Quantity
150g
cut into 1cm cubes
Hatchō mame-miso (red soybean miso)
Quantity
3 to 4 tablespoons
scallions
Quantity
2
thinly sliced
| Ingredient | Quantity |
|---|---|
| konbu (dried kelp) | 1 piece (about 10g) |
| cold water | 4 1/2 cups |
| katsuobushi (dried bonito flakes) | 20g |
| dried shiitake (optional)for meatless shōjin dashi | 4 |
| nameko mushroomstrimmed if fresh, briefly rinsed if packaged | 120g |
| firm tofucut into 1cm cubes | 150g |
| Hatchō mame-miso (red soybean miso) | 3 to 4 tablespoons |
| scallionsthinly sliced | 2 |
Equipment Needed
- •Medium heavy pot
- •Fine-mesh strainer lined with a clean cloth
- •Miso koshi (miso strainer), or a ladle and small whisk
- •Lacquer soup bowls (wan), warmed before serving
Instructions
- 1
Steep the konbu
Wipe the konbu with a damp cloth, but don't wash it. The pale bloom on the surface isn't dirt, it's flavor, and water takes it away. Put the konbu in the cold water and bring it up slowly over low heat, ten to fifteen minutes. Pull it out when the water trembles and small bubbles climb the sides of the pot, before a full boil begins.
You're steeping the konbu, not boiling it. Boil it and the stock can turn bitter, slick, and cloudy, which is exactly the roughness this dark soup does not need. - 2
Add the flakes
Bring the konbu water to a gentle boil. Add the katsuobushi all at once, turn off the heat, and leave the pot alone for two or three minutes. The flakes will sink as they give up their flavor. Don't stir them around; stirring pulls out stronger, heavier flavors when you want a clean dashi under the red miso.
For a meatless table, soak the konbu with the dried shiitake overnight, then warm them slowly and strain. That shōjin dashi, temple-kitchen stock, is honmono, not a compromise. It simply has a rounder, earthier depth. - 3
Strain the dashi
Strain the dashi through a fine-mesh strainer lined with a clean cloth, and let it drip naturally. Don't squeeze the bonito flakes. Squeezing presses out oily, fishy notes and roughens the stock, and akadashi already has all the strength it needs from the miso.
- 4
Prepare the additions
Briefly rinse packaged nameko to remove the sharp taste of the packing liquid, but don't scrub away their natural slipperiness. That texture is part of the pleasure. Cut the tofu into small cubes so it warms quickly without needing a hard boil, and slice the scallions thinly for the finish.
- 5
Warm the soup
Return about 4 cups of dashi to the pot and bring it to a quiet simmer. Add the nameko and cook for two minutes, until they look glossy and settled in the broth. Add the tofu and warm it for another minute. These are strong enough companions for Hatchō miso, but they don't need rough handling.
- 6
Loosen the miso
Turn the heat low, or off if your stove runs hot. Set 3 tablespoons of Hatchō miso in a miso koshi, or put it in a ladle with a little hot dashi, and mash until smooth before stirring it into the pot. Taste, then add the remaining miso if the soup needs more depth. Hatchō miso is dense, so this step saves you from lumps and lets you season by taste rather than hope.
Never boil the soup after the miso goes in. Boiling drives off its aroma and makes the bitter edge louder. The soup should be hot enough to serve, not punished. - 7
Serve at once
Ladle the akadashi into warmed bowls and scatter the scallion over the surface. Serve it beside rice and food with some force to it: grilled fish, broiled eel, fried pork, or simmered root vegetables. This is not a delicate whisper of a soup. Leave it clear, dark, and unhidden.
Chef Tips
- •Buy true Hatchō mame-miso from Aichi if you can. Many tubs labeled akadashi are blends with rice miso; they're common and useful, but they taste rounder and less severe. Don't pretend they are the same bowl.
- •Start with less miso than you think. Hatchō miso is salty, bitter, and deep, and it blooms as it sits in hot dashi. If the soup tastes thin, loosen a little more miso with dashi and add that, not plain salt.
- •Nameko is especially good in cooler months, when its slippery cap and earthy flavor suit the dark broth. If the mushrooms in front of you look tired, change the dish: use daikon, aburaage, or clams instead. Nothing hidden.
- •Don't reach for instant granules when the dashi is the structure of the soup. A dark miso can cover many things, but a flat stock makes a flat akadashi.
Advance Preparation
- •The konbu can soak in the cold water overnight in the refrigerator for a gentler dashi.
- •Finished dashi keeps two days refrigerated. Add the miso only just before serving, because reheated miso soup loses aroma and turns harsher.
- •Tofu can be cubed a few hours ahead and kept covered in fresh water in the refrigerator. Drain it before warming in the soup.
Frequently Asked Questions
Nutrition Information
1 serving (about 300g)
Calories
80 calories
Total Fat
3 g
Saturated Fat
0 g
Trans Fat
0 g
Unsaturated Fat
2 g
Cholesterol
2 mg
Sodium
740 mg
Total Carbohydrates
8 g
Dietary Fiber
2 g
Sugars
2 g
Protein
6 g
Where cooking meets culture.
Culinary guides, cultural storytelling, and the editorial depth that makes cooking meaningful.
Discover Culinary ExplorerMore from Miso & Clear Soups
Browse the full collection
Chef Takumi
Chilled Edamame Pureed Soup (枝豆のすり流し, Edamame no Surinagashi)
High-summer edamame needs very little help: a quick blanch, patient pounding, and cold ichiban dashi enough to make a pale-green soup that tastes clean and almost weightless.
Chef Takumi
Clear Soup (すまし汁, Sumashijiru)
Sumashijiru is the clear soup that teaches restraint: first-pressing dashi, a breath of light soy and salt, then one or two seasonal things left visible.
Chef Takumi
Grated-Daikon Clear Soup (みぞれ汁, Mizorejiru)
Winter daikon, grated just before serving, turns clear dashi into a bowl of quiet sleet. Keep the stock clean and warm the radish gently, and the soup stays almost weightless.