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Simmered Soybeans (五目豆, Gomoku-mame)

Simmered Soybeans (五目豆, Gomoku-mame)

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Gomoku-mame is batch cooking the washoku way: soybeans cooked tender first, then simmered with small-cut vegetables in sweet soy-dashi until each bite tastes settled and clean.

Salads
Japanese
Make Ahead
Meal Prep
Batch Cooking
30 min
Active Time
1 hr 45 min cook10 hr 15 min total
Yield6 side-dish servings

Gomoku-mame is the small dish that earns its keep. It sits in the corner of a tray, beside rice and soup, and does its work for several days: beans, carrot, konnyaku, hijiki, and shiitake, each one clear in the mouth. This is jōbi-sai, a side kept ready. Gomoku means 'five items,' but don't let the number bully you; in the kitchen it means a sensible mixture, not an arithmetic lesson.

The dish looks busy and asks for patience, not skill. The one detail that decides it is the soybean. Cook the beans until they are fully tender before the shōyu goes anywhere near them, because salt tightens the skins and can leave them stubborn no matter how long you mutter at the pot. Tender first, seasoning second. That's the whole door.

After that we do what washoku often does best: build a clear dashi, cut the vegetables small enough to belong with the beans, and let a quiet simmer settle everything into one bowl. A wooden drop-lid, otoshibuta, keeps the pieces under the broth without stirring; a parchment circle works well. Serve gomoku-mame at room temperature, and make it ahead. It tastes more like itself after a night in the refrigerator, one of the kinder tricks of batch cooking.

Food names using gomoku, 'five items,' have long been used for mixed dishes such as gomoku-zushi, gomoku-gohan, and gomoku-mame; the number came to mean an assortment rather than a strict count. Gomoku-mame belongs to jōbi-sai, prepared side dishes kept on hand, and after Japan's 1954 School Lunch Act helped standardize kyūshoku (school lunch), soybean dishes fit neatly into lunchroom cooking because they were inexpensive, filling, and easy to portion. Its ingredients show older household logic as well: dried soybeans, dried shiitake, and hijiki stored well, while konnyaku added chew from konjac, a mountain crop processed into a firm jelly.

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Ingredients

dried soybeans (daizu)

Quantity

1 cup (180g)

rinsed and soaked 8 to 12 hours

cold water for soybeans

Quantity

4 cups, plus more as needed

dried shiitake mushrooms

Quantity

4

soaked, stems removed, caps diced

warm water for shiitake

Quantity

1 cup

dried hijiki

Quantity

10g

rinsed, soaked, and drained

konbu (dried kelp)

Quantity

1 piece (about 5g)

cold water for dashi

Quantity

2 cups

katsuobushi (bonito flakes)

Quantity

10g

konnyaku

Quantity

1/2 block (about 125g)

cut into 1 cm dice

carrot

Quantity

1 medium (about 120g)

peeled and cut into 1 cm dice

sea salt

Quantity

1 teaspoon

for rubbing the konnyaku, plus more only if needed

sugar

Quantity

2 tablespoons

mirin

Quantity

2 tablespoons

shōyu (Japanese soy sauce)

Quantity

3 tablespoons

Equipment Needed

  • Fine-mesh strainer lined with a clean cloth
  • Wide heavy pot for the final simmer
  • Wooden drop-lid (otoshibuta), or a parchment circle with a small center hole
  • Small saucepan for blanching konnyaku

Instructions

  1. 1

    Soak the beans

    Put the soybeans in a bowl with 4 cups cold water and soak 8 to 12 hours. They should swell to nearly double their size; if they don't, the beans are old and will need a longer simmer. In a second bowl, cover the dried shiitake with 1 cup warm water for 30 minutes, or cold water overnight. Strain and reserve the soaking liquid, because it carries the shiitake's clean depth into the broth.

  2. 2

    Make the dashi

    Wipe the konbu with a damp cloth, but don't wash it. The pale powder on the surface is not dirt, it's flavor. Put the konbu in 2 cups cold water and warm it slowly over low heat, about 10 minutes. Pull the konbu when the water trembles and small bubbles gather at the sides, before it boils. Add the katsuobushi all at once, take the pot off the heat, and leave it alone for 2 minutes. Strain through a cloth or fine sieve and let it drip on its own. Don't squeeze the flakes, or the stock turns heavy and oily.

    You are guarding clarity twice: first by keeping the konbu below a boil, then by letting the bonito flakes drain without pressure.
  3. 3

    Cook the soybeans

    Drain the soaked soybeans and put them in a pot with fresh water to cover by 2 inches. Bring to a boil, lower to a quiet simmer, and skim off the foam that gathers. Cook 60 to 90 minutes, partly covered, until one bean crushes easily between finger and thumb. Do not season yet. Shōyu and salt tighten the skins and slow the softening, so tenderness comes before taste.

    This is the detail that decides the dish. A soybean that is not tender now will not become tender in sweet soy broth.
  4. 4

    Prepare the pieces

    Rinse the hijiki, soak it in plenty of water for 10 minutes, then drain and rinse again. Remove the shiitake stems and dice the caps. Cut the carrot and konnyaku into 1 cm dice, close to the size of the cooked soybeans. The cut is not decoration here. Pieces of the same size season evenly and make each spoonful feel like one dish, not beans with guests.

  5. 5

    Blanch the konnyaku

    Rub the diced konnyaku with the sea salt, then boil it in plain water for 2 minutes and drain. This drives off its raw mineral smell and helps the surface take the broth. Konnyaku has a stubborn nature, which is part of its charm, but charm still needs a little discipline.

  6. 6

    Start the simmer

    Drain the cooked soybeans. In a wide pot, combine the soybeans, carrot, shiitake, hijiki, konnyaku, 1 1/2 cups dashi, 1/2 cup strained shiitake soaking liquid, sugar, and mirin. Bring to a gentle simmer and set a wooden drop-lid, otoshibuta, directly on the surface, or use a parchment circle with a small hole in the center. Simmer 10 minutes before adding the shōyu. Sweetness enters slowly, and without salt in the pot yet, the beans and vegetables drink more evenly.

    The drop-lid keeps the pieces under the broth without stirring. Stirring breaks beans; quiet pressure seasons them.
  7. 7

    Add the shōyu

    Add the shōyu and swirl the pot gently to mix. Keep the simmer low and cook 20 to 25 minutes, with the drop-lid in place, until the carrot is tender, the soybeans are glossy, and only a shallow spoonful of liquid remains. If the pot looks soupy near the end, remove the drop-lid for the last 5 minutes. Stop while the beans still look moist; dry gomoku-mame tastes tired.

    The final liquid should glaze the pieces, not flood them. A little broth left in the pot will settle into the beans as they cool.
  8. 8

    Rest and serve

    Take the pot off the heat and let the gomoku-mame rest at least 30 minutes before serving. Taste only after it has cooled a little; the seasoning settles as the beans drink. Add a pinch of salt only if it tastes flat. Serve at room temperature in small portions, with rice, soup, and one or two other side dishes.

Chef Tips

  • Buy dried soybeans from a shop where they move quickly. Old beans can look perfectly innocent and still refuse to soften, and no sauce will rescue that. Sourcing first, always.
  • Canned or packaged cooked soybeans are a sensible stand-in when time is short. Use 3 cups drained beans and skip the long bean simmer, but know they won't drink the broth as deeply as dried beans cooked from the start.
  • For a meatless table, leave out the katsuobushi and make the stock with konbu and the shiitake soaking liquid, the way temple kitchens do. That is honmono, not a consolation prize.
  • Don't reach for dashi powder here. The broth has little else to hide behind, and granules push salt forward before the beans have their quiet sweetness.
  • Hijiki is used in small amounts. Rinse and soak it well, and serve this as the little side it is, not as a main bowl. Restraint is part of the method.

Advance Preparation

  • Soak the soybeans and shiitake the night before. The quiet overnight soak is not wasted time; it gives you tender beans without a fight.
  • The dashi can be made up to 2 days ahead and kept refrigerated. Keep it unseasoned until the final simmer.
  • Finished gomoku-mame keeps 5 days in a covered container in the refrigerator and tastes best after at least a few hours of rest. Serve it cool or at room temperature.
  • Do not freeze this dish if the texture matters. Konnyaku turns rubbery after freezing, and the careful little dice lose their point.

Frequently Asked Questions

Nutrition Information

1 serving (about 150g)

Calories
145 calories
Total Fat
3 g
Saturated Fat
0 g
Trans Fat
0 g
Unsaturated Fat
2 g
Cholesterol
1 mg
Sodium
530 mg
Total Carbohydrates
20 g
Dietary Fiber
6 g
Sugars
8 g
Protein
10 g

Note: Chef personas and recipes are created with AI assistance. Cook with care: follow safe food-handling practices, check doneness with a thermometer when needed, and adapt for allergies and your kitchen.

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