Japanese Hibachi Soup: Make the Clear Onion Broth at Home

Japanese hibachi soup is a light, savory clear soup commonly served before a teppanyaki-style meal at Japanese-American restaurants. This home version builds flavor by simmering onion, carrot, celery, and garlic in broth, then serving the strained soup with mushrooms and scallions. The vegetables add depth without making the broth heavy, and the method is straightforward enough for a weeknight.

Ingredients

1 tablespoon neutral oil (15 ml), such as canola or avocado oil
1 medium yellow onion, roughly chopped (about 5 ounces/150 g)
1 small carrot, roughly chopped (about 2 ounces/60 g)
1 celery stalk, roughly chopped (about 1½ ounces/40 g)
1 garlic clove, lightly crushed (about 3 g)
6 cups low-sodium chicken broth or beef broth (1.4 L); use vegetable broth for a meat-free soup
1 tablespoon soy sauce (15 ml), preferably regular or reduced-sodium
4 ounces white button or cremini mushrooms, thinly sliced (115 g)
¼ teaspoon fine salt (about 1.5 g), plus more to taste
⅛ teaspoon freshly ground black pepper (about 0.3 g)
2 tablespoons thinly sliced scallions (about 6 g), for serving

Instructions

Prepare the vegetables. Roughly chop the onion, carrot, and celery into pieces that will be easy to remove later. Lightly crush the garlic clove with the flat side of a knife, leaving it whole so it can be lifted out with the other aromatics. Slice the mushrooms thinly and set them aside with the scallions. This prep takes about 12 minutes, depending on your knife speed.
Soften the aromatics. Set a medium pot over medium heat and add the oil. When it shimmers, add the onion, carrot, and celery. Cook for 5 minutes, stirring occasionally, until the onion begins to look translucent and the vegetables smell sweet. They do not need to brown; browned bits can darken the broth and give it a roasted flavor that is different from the delicate, clear style.
Add the broth and seasonings. Pour in the broth and stir in the crushed garlic, soy sauce, salt, and black pepper. Raise the heat just enough to bring the liquid to a gentle simmer, which usually takes about 4 minutes. Avoid a hard boil. A rolling boil can break up the vegetables and make the soup look cloudy, while a quiet simmer gives the aromatics time to flavor the broth.
Simmer the broth. Keep the pot uncovered at a gentle simmer for 17 minutes. Adjust the burner as needed so only small bubbles rise now and then. Taste a spoonful near the end; the broth should be savory but not strongly salty, since the mushrooms and scallions will add their own flavor and soy sauce varies in saltiness.
Strain and finish with mushrooms. Set a fine-mesh strainer over a heatproof bowl or a second pot and carefully pour the broth through it. Discard the cooked vegetables and garlic; they have given up much of their flavor and are not meant to be the garnish in this clear version. Return the strained broth to the pot, add the sliced mushrooms, and simmer for 4 minutes, just until the mushrooms are tender but still hold their shape.
Serve hot. Ladle the broth and mushrooms into four small soup bowls and scatter the scallions over the top. Taste once more and add a pinch of salt if needed. For the familiar restaurant-style presentation, keep the portions modest and serve the soup as a first course rather than as a large, filling main dish.

Tips

Choose a clear, mild broth. Low-sodium chicken or beef broth gives the soup a rounded savory base. For a vegetarian version, choose a mild vegetable broth; strongly flavored roasted vegetable stock can overwhelm the onion and mushroom notes. If your broth is already salty, leave out the measured salt and adjust at the end.
Keep the simmer gentle. The goal is to extract flavor, not boil the vegetables to pieces. If the broth boils vigorously, reduce the heat. Straining removes the aromatics and gives the soup its clear look, so do not mash them through the sieve.
Make sensible swaps. Cremini, white button, or shiitake mushrooms all work. Shiitakes have a deeper, more distinctive flavor, so use them if you want a more pronounced mushroom character. If you do not have fresh garlic, omit it rather than adding a large amount of garlic powder, which can make the broth taste dusty.
Adjust carefully for dietary needs. Tamari can replace soy sauce, and many tamari products are labeled gluten-free; check the package if gluten matters to you. Use vegetable broth and confirm that the soy sauce or tamari fits your needs. These swaps change the flavor slightly, but keep the soup’s savory profile.

Serving Suggestions

Serve a small bowl at the start of a meal with fried rice, steamed rice, or a teppanyaki-style spread of vegetables and grilled foods. The light broth is especially useful alongside dishes with richer sauces because it refreshes the palate without competing for attention. Add the scallions just before serving so they stay bright and aromatic.

For a more substantial lunch, serve a larger portion with rice and a plate of sautéed vegetables. You can also put a few extra mushroom slices in each bowl, but avoid adding so many that the soup becomes more like a mushroom stew. If serving several people, keep the broth warm over low heat and portion it into bowls shortly before eating.

Variations

Vegetarian clear soup: Use a mild vegetable broth in place of chicken or beef broth. Some packaged vegetable broths are sweet or strongly herbal, so taste yours before adding salt and soy sauce. A splash of extra soy sauce can deepen the savory flavor, but add it a teaspoon at a time to avoid oversalting.

More mushroom-forward: Replace some or all of the button mushrooms with thinly sliced shiitakes. Their flavor is earthier and more assertive. If using dried shiitakes, rehydrate them according to the package directions, strain the soaking liquid carefully to remove grit, and use a little of that liquid in place of an equal amount of broth. The soup will taste more intensely mushroomy.

Extra vegetables in the bowl: Keep the broth clear but add a few very thin carrot ribbons or sliced mushrooms to each serving. Simmer those additions in the strained broth until just tender. This gives the bowls more texture without leaving the long-cooked, strained aromatics in the soup.

Gluten-free option: Choose broth labeled gluten-free and replace ordinary soy sauce with gluten-free tamari. Tamari can taste a little richer and less sharp, so begin with the same amount, taste the broth, and adjust in small increments. Do not assume every soy sauce or broth is gluten-free; read the label.

Storage and Reheating

Cool leftovers promptly and refrigerate them within 2 hours of cooking in a covered, shallow container. The soup keeps for 3 to 4 days in the refrigerator. For the freshest texture, store the scallions separately and add them when serving. The mushrooms may soften as they sit, but the broth will remain suitable for reheating within that storage window.

Reheat only the amount you plan to eat in a small saucepan over medium heat, stirring occasionally, until it is steaming throughout and reaches 165°F (74°C). Check the temperature with a food thermometer, especially if reheating a larger portion. Avoid repeatedly warming and cooling the whole batch. You can freeze the broth for up to 2 months for best quality; mushrooms may become softer after thawing, so add fresh mushrooms during reheating if texture is important.

Frequently Asked Questions

Is Japanese hibachi soup the same as miso soup?

No. This clear, onion-based soup is different from miso soup, which is made with miso paste and commonly includes ingredients such as tofu and seaweed. Restaurant menus and recipes vary, but the hibachi-style version described here gets its flavor from simmered vegetables, broth, soy sauce, and mushrooms rather than miso.

Why did my broth turn cloudy?

A vigorous boil, browned vegetables, or pressing the cooked aromatics through the strainer can cloud the broth. Keep the pot at a gentle simmer and let the liquid drain through the sieve without pushing the vegetables. A little natural haze is harmless and does not mean the soup has gone bad; it mainly affects the clear appearance.

Can I make the soup ahead?

Yes. Prepare the broth, strain it, and refrigerate it within 2 hours. For the best mushroom texture, store the strained broth separately and simmer the mushrooms in it shortly before serving. You can make the soup up to 3 or 4 days ahead, keeping it covered in the refrigerator, then reheat it to 165°F (74°C).

What kind of broth tastes most like restaurant soup?

There is no single standard recipe used by every restaurant. A mild chicken broth is a familiar choice, while beef broth creates a deeper, darker flavor. Try either with low-sodium broth so you can control the salt, and remember that the amount of soy sauce needed depends on the broth you start with.

Can I leave the vegetables in instead of straining them?

Yes, though the result will be less clear and more rustic. If you want to keep them, chop them finely and serve them in the bowl, or strain out only the garlic and celery while leaving some onion and carrot. The long-simmered vegetables will be very soft, so add fresh sliced vegetables near the end if you prefer a firmer bite.

More recipes to cook

Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

Spotted an error? Tell us and we will correct it (corrections policy).