Ippudo-Style Tonkotsu — Hakata White & Red at Home

When Shigemi Kawahara opened Hakata Ippudo in Fukuoka in 1985, pork bone ramen had a reputation problem. Tonkotsu shops were often cramped and pungent. Kawahara changed that: he eliminated the characteristic odor by precisely controlling the simmer, hired polite staff, played jazz in the dining room, and — critically — developed two distinct bowls that offered customers a choice of personality. Shiromaru (white circle) was the clean, classic Hakata tonkotsu. Akamaru (red circle) layered in spicy miso paste and fried garlic oil for a bolder, more complex statement.

Today, Ippudo operates in more than 20 countries, with locations in New York (2008, its first overseas shop), Hong Kong, London, Paris, Sydney, and beyond — more than 70 restaurants globally as of 2024. This home-kitchen recipe is inspired by both bowls — not affiliated with, endorsed by, or an official recipe of Ippudo. It’s a home cook’s interpretation of the Hakata tonkotsu tradition that Ippudo helped bring to the world.

Disclaimer: This is an original home-kitchen recipe inspired by the Ippudo style. It is not affiliated with, endorsed by, or an official recipe of Ippudo or Chikaranomoto Holdings.

Table of Contents

1. What Is Ippudo-Style Tonkotsu?
2. Shiromaru vs. Akamaru — Comparison
3. Ingredients
4. Hakata Tonkotsu Broth
5. Shiromaru Tare (White)
6. Akamaru Tare (Spicy Miso)
7. Ultra-Thin Noodles & Kaedama
8. FAQ
9. Recommended Items
10. Sources & References

What Is Ippudo-Style Tonkotsu?

Hakata tonkotsu is defined by its milky white pork-bone broth — turbid from the emulsification of collagen and fat through a vigorous boil — and its ultra-thin, straight noodles with a firm, springy texture. Unlike the Jiro style’s thick noodles or the Yokohama iekei style’s medium noodles, Hakata noodles are among the thinnest in the ramen world, finished to a near-capellini diameter.

What Ippudo added to the tradition was refinement without compromise. The broth retained its characteristic richness but lost the aggressive smell. The toppings — char siu, kikurage mushrooms, bean sprouts, bamboo shoots — were presented with care. And the dual menu concept (Shiromaru and Akamaru) gave the restaurant a breadth that allowed it to appeal to first-timers and regulars alike.

Shiromaru vs. Akamaru — Comparison

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Ingredients

Serves 4.

Tonkotsu Broth Base

• Pork leg bones (ashi or femur), split — 1 kg / 2.2 lbs
• Pork trotters (split) — 2 pieces (approx. 400 g / 14 oz)
• Water — 2.5 liters / 10.5 cups (plus extra for blanching)
• Ginger — 2 slices
• Garlic — 2 cloves

Shiromaru Tare (White Seasoning Sauce)

• Soy sauce — 3 tbsp
• Salt — 1½ tsp
• Mirin — 1 tbsp
• Chicken stock — 50 ml / 3½ tbsp (for thinning the tare)

Akamaru Umami Dama (Spicy Miso Paste)

• Red miso (aka miso) — 3 tbsp
• Toban djan (spicy chili bean paste / doubanjiang) — 1 tbsp
• Garlic — 2 cloves, minced and fried in 1 tbsp neutral oil until golden
• Sesame oil — 1 tsp
• Sugar — ½ tsp

Noodles & Toppings (per serving)

• Ultra-thin straight ramen noodles — 120–140 g / 4–5 oz (raw weight)
• Char siu (thin-sliced braised pork belly or loin) — 3 slices
• Kikurage (wood ear mushrooms), rehydrated and thinly sliced — 2 tbsp
• Bean sprouts — small handful, blanched 30 seconds
• Bamboo shoots (menma) — 2 tbsp
• Ajitsuke tamago (marinated soft-boiled egg) — ½ per serving
• Sliced scallions — 1 tbsp
• Nori — 1 sheet, optional

Hakata Tonkotsu Broth

Step 1 — Cold Soak and Blanch

Soak the pork bones and trotters in cold water for 1 hour — this draws out blood, which would otherwise cloud the broth. Drain, then place the bones in a large pot and cover with fresh cold water. Bring to a rolling boil and cook for 5 minutes. Drain and rinse each bone thoroughly under cold running water, removing any dark residue.

Step 2 — High Boil for Whiteness

Return the cleaned bones to a fresh pot. Add 2.5 liters of cold water, ginger, and garlic. Bring to a vigorous boil over high heat — for Hakata tonkotsu, you want a rolling boil, not a gentle simmer. The turbulence is what emulsifies the fat and collagen into the white, creamy broth. Cook at a vigorous boil for 2.5–3 hours, adding boiling water as needed to maintain the level above the bones.

Step 3 — Strain and Season

Strain the broth through a fine-mesh strainer. You should have approximately 1.5 liters of milky white broth. Discard the solids. The broth is now unseasoned — seasoning (tare) is added per bowl at serving time, not to the communal pot. Keep the broth hot over low heat.

Shiromaru Tare (White)

Combine soy sauce, salt, mirin, and chicken stock in a small saucepan. Bring to a gentle simmer for 2 minutes, stirring to dissolve the salt. Remove from heat. Store in a sealed jar in the refrigerator for up to 1 week.

To serve Shiromaru: Add 2 tablespoons of tare to a warmed ramen bowl. Ladle 300–350 ml / 1¼–1½ cups of hot tonkotsu broth over the tare and stir briefly to combine. Add cooked noodles, then top with char siu, kikurage, bean sprouts, menma, egg half, and scallions. Serve immediately.

Akamaru Tare (Spicy Miso)

Making the Umami Dama

In a small pan over medium heat, fry the minced garlic in neutral oil until golden brown and fragrant, about 2 minutes. Remove from heat. In a bowl, combine the fried garlic oil (including the golden garlic bits), red miso, toban djan, sesame oil, and sugar. Mix thoroughly to form a smooth paste. This is the Umami Dama — the “umami ball” that distinguishes Akamaru.

To serve Akamaru: Add 1 tablespoon of Shiromaru tare and 1.5 tablespoons of Umami Dama to a warmed bowl. Add 300–350 ml of hot tonkotsu broth and stir to incorporate the paste. Taste and add more Umami Dama if you want more heat. Add noodles and toppings as for Shiromaru.

Ultra-Thin Noodles & Kaedama

Noodle Selection

Hakata-style noodles are straight and thin — roughly 1–1.5 mm diameter, closer to angel hair pasta than standard ramen noodles. Outside Japan, look for:

• Sun Noodle “Hakata” ramen noodles — available at Japanese grocery stores in North America, Australia, and the UK
• Thin dried ramen noodles labeled 細麺 (hosomen) — widely available in Asian grocery stores
• Angel hair pasta cooked with baked baking soda water — dissolve 1 tsp baked baking soda per 250 ml water and use as cooking liquid for the closest substitute

What Is Kaedama?

Kaedama (替え玉) is the Hakata ramen custom of ordering an extra serving of noodles (just the noodles, no additional broth) to drop into your remaining bowl after finishing the first portion. Because the noodles are thin and cook quickly, a fresh kaedama takes only 30–60 seconds and arrives at the table still firm. You add it to the broth you’ve already seasoned and customized.

At home, kaedama is easy: cook a second portion of thin noodles while your guests are finishing their first, drain and add directly to the bowls. Because a typical Hakata ramen bowl uses only 120–140 g of noodles, you’ll have broth left over even after the first portion — that’s intentional, and it’s what makes kaedama work.

This recipe is an original compilation by the HowToCook.jp editorial team, based on general culinary knowledge of Hakata tonkotsu techniques. It is not based on any proprietary or official Ippudo recipe.

FAQ

Q: Why does my tonkotsu broth smell strong? How do Hakata shops eliminate the odor?

A: The characteristic tonkotsu smell comes from volatile compounds released by pork bones during boiling, particularly from marrow and blood. Two steps eliminate most of the odor: (1) the cold-water soak before blanching draws out blood; (2) thorough rinsing after blanching removes surface impurities. If your broth still smells strong after these steps, it usually means the cold soak was too short (under 30 minutes) or the blanching water wasn’t discarded completely. Re-blanching the rinsed bones once more with fresh water can further reduce the smell.

Q: What is the difference between tonkotsu and tonkatsu?

A: A very common mix-up. Tonkotsu (豚骨) literally means “pork bone” — it refers to the broth made by boiling pork bones for a long time. Tonkatsu (豚カツ) is a completely different dish: a breaded and deep-fried pork cutlet, similar to a Wiener schnitzel. They share the “ton” (豚, meaning pig) prefix but are otherwise unrelated.

Q: Can I make Ippudo-style tonkotsu without a large stockpot?

A: Yes. An 8-liter pot is the minimum usable size for this recipe — the bones need to be submerged and the boil needs room. Alternatively, use a pressure cooker (see the shortcut note in the broth section). The broth can also be made in smaller batches and combined: two 4-liter batches = one full recipe.

Q: How long does tonkotsu broth keep?

A: Refrigerated in a sealed container, up to 4 days. Frozen in portioned bags or containers, up to 2 months. The broth will solidify into a white gel when cold — that is normal and a sign of good collagen content. Reheat over medium heat, stirring gently, until fully liquid.

Recommended Items

Sources & References

• Ippudo — Wikipedia
• About IPPUDO — Ippudo US Official
• The Pioneer of Hakata Ramen That Captivated the World — Japan Food Guide
• The Complete Menu Guide for First-Time Visitors to Ippudo — TOKYO IROHA
• Hakata Ippudo — Ramen Adventures
• Ippudo ramen chain credits its global success to localized tastes — Honolulu Star-Advertiser
• Hakata Tonkotsu Ramen Recipe (博多ラーメンの作り方) — Ramen Kaonashi — Authentic from-scratch Hakata tonkotsu recipe—the same style Ippudo built its brand on—with detailed broth ratios, bone preparation, and thin noodle guidance.
• Hakata Ramen Recipe: Char Siu Pork, Pickled Ginger, and Fried Garlic — Dinner By Dennis — English-language recipe for Hakata-style tonkotsu ramen including classic Ippudo-style toppings: chashu, pickled ginger, and fried garlic.
• 10-Minute Cheat’s Tonkotsu Ramen — Sudachi Recipes — Quick-cook approach to recreating the Hakata tonkotsu broth style at home, useful as a weeknight alternative to the full 12-hour method.

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Recipe attribution: This recipe is an original compilation by the HowToCook.jp editorial team, based on general knowledge of Hakata tonkotsu techniques. It is not affiliated with or endorsed by Ippudo or Chikaranomoto Holdings.

情報の最終確認日: 2026年02月