Tenkaippin-Style Ramen — Ultra-Thick Chicken Broth at Home

If you’ve ever queued outside a Tenkaippin location in Kyoto and lifted that first spoonful of broth — only for it to slide off the ladle like gravy — you’ll understand the obsession. The chain’s legendary kotteri (“thick”) ramen isn’t just chicken soup. It’s a potage-like emulsion that coats every strand of noodle and leaves you wondering how plain water and chicken bones could produce something so unapologetically rich.

This article is an independent home-cook recreation inspired by the Tenkaippin style. It is not the official Tenkaippin recipe, and this site has no affiliation with Tenkaippin Co., Ltd. What follows is a practical guide to achieving a similarly ultra-thick chicken broth in your own kitchen, built on the same principles: long simmering, bone collagen, and a touch of starchy vegetable to push the thickness over the edge.

What Is Tenkaippin-Style Ramen?

Tenkaippin (天下一品) is a Kyoto-born ramen chain founded in 1971 by Tsutomu Kimura. Inspired by a doctor’s advice to eat more chicken, Kimura spent months developing a broth unlike anything else in Japan: impossibly thick, opaque, and deeply savory, made from chicken bones simmered for hours with vegetables until the collagen practically solidified the liquid.

Regulars nicknamed it kotteri — literally “rich” or “heavy” — and the word has been synonymous with Tenkaippin ever since. The broth is so thick that the chain even offers an ultra-premium version available only five times a day at certain locations, described as requiring a spoon rather than slurping.

In technical terms, Tenkaippin’s broth belongs to the tori paitan (鶏白湯, “white chicken broth”) family. Unlike clear chintan soups, paitan broths are cooked at a rolling boil that emulsifies the fat and breaks down collagen, turning the liquid milky white. What sets the Tenkaippin style apart is the addition of starchy vegetables — most likely potato or similar roots — that push viscosity even further, creating a texture closer to cream of chicken soup than conventional ramen broth.

Ingredients (3–4 servings)

For the Kotteri-Style Broth

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For the Tare (Seasoning Concentrate)

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For Serving

• Fresh or dried ramen noodles — straight, medium thickness
• Chashu pork (braised pork belly) — optional but traditional
• Green onions (scallions), thinly sliced
• Seasoned soft-boiled egg (ajitsuke tamago) — optional
• Bamboo shoots (menma) — optional

Making the Ultra-Thick Broth

Step 1 — Blanch the Bones

Place all chicken parts (backs, carcasses, skin) in a large pot and cover with cold water. Bring to a vigorous boil over high heat and let it bubble for 5 minutes — you’ll see a grey, foamy scum rise to the surface. Drain the water completely, then rinse each piece under cold running water to remove residual impurities. This blanching step is non-negotiable: it produces a cleaner, less gamey final broth.

Step 2 — Build the Aromatics

Return the cleaned bones to the pot. Add the peeled and halved onion, smashed garlic, ginger slices, and the whole peeled potato. Pour in 2.5 liters (10 cups) of cold water. Bring everything to a full rolling boil over high heat — you want an aggressive, churning boil, not a gentle simmer. This turbulence is what emulsifies the fat and collagen, turning the broth milky white. Do not reduce the heat yet.

Step 3 — Simmer 4 Hours

Once the water is boiling, reduce heat just enough to maintain a strong rolling boil without the pot boiling over — roughly medium-high on most stovetops. Cook uncovered for 4 hours, adding water in 200 ml (¾ cup) increments whenever the level drops below the bones. After 2 hours, start crushing the softened bones and potato with a wooden spoon or potato masher every 30 minutes. This mechanical action releases more marrow, collagen, and starch into the liquid.

The broth should look opaque white or off-white by the 2-hour mark. By hour 4, it should be noticeably thicker — cling to a spoon, not pour freely like water. If the broth still looks thin at the 3-hour mark, increase heat slightly and leave the lid completely off.

Step 4 — Blend & Season

Remove large bone pieces and discard them. Transfer the remaining liquid and soft vegetable matter (potato, onion, garlic, ginger) to a blender, or use an immersion blender directly in the pot. Blend on high speed for 60–90 seconds until perfectly smooth. Pass the blended broth through a fine-mesh strainer, pressing hard on the solids to extract every drop of starchy, collagen-rich liquid. Discard the fibrous residue.

Return the strained broth to the pot. Combine the tare ingredients (soy sauce, mirin, salt) in a small bowl, then stir into the broth one tablespoon at a time, tasting as you go. The broth is rich, so err toward less seasoning — you can add more at the bowl stage. Keep warm over the lowest heat setting until serving. Note: chicken must reach an internal temperature of 165°F (74°C) to be food-safe (USDA/FDA guidance for poultry); the 4-hour rolling boil in this recipe far exceeds that threshold.

The Secret to Thickness

Most tori paitan recipes rely solely on collagen and fat emulsification for their creamy texture. The Tenkaippin-inspired approach adds a second lever: starchy vegetable paste. Potato, cooked until completely soft over 4 hours of boiling, breaks down into microscopic starch granules that thicken the broth the same way a cream soup is thickened — from the inside, not by adding cornstarch at the end.

Why Potato Works Better Than Cornstarch

A cornstarch slurry added at the end thickens the broth but leaves it with a glossy, gel-like texture that can feel artificial. Potato cooked into the broth from the start integrates completely — the starch granules hydrate and swell during the long simmer, creating a matte, velvety body that closely matches the Tenkaippin texture. The potato also adds a faint natural sweetness that rounds out the savory depth of the chicken collagen.

The Role of Chicken Skin

Chicken skin is exceptionally high in collagen. When boiled at high temperature for several hours, the collagen converts to gelatin, which is what gives the broth its characteristic body. A well-made batch will partially solidify in the refrigerator — this is a sign of quality, not a defect. Reheat gently and it liquefies again.

Assembly & Serving

Building the Bowl

Warm your serving bowls by filling them with hot water for 1 minute, then pouring it out. Cook ramen noodles according to the package instructions — drain well, shaking off excess water before adding to the bowl. A wet, watery noodle bed dilutes the thick broth instantly. Ladle 300–350 ml (1¼–1½ cups) of hot broth over the noodles. The broth is intensely flavored, so resist the temptation to add more.

Traditional Tenkaippin-Style Toppings

• Thinly sliced chashu pork (2–3 pieces)
• Scallions, finely sliced (a generous handful)
• Bamboo shoots (menma), briefly warmed in soy sauce
• Half a seasoned soft-boiled egg
• A light drizzle of sesame oil (optional, not traditional but enhances aroma)

Tenkaippin locations typically serve their kotteri ramen with thin, straight noodles. If you prefer a denser bite, opt for medium-thickness noodles, but avoid wavy or thick noodles — they fight the thick broth rather than carry it.

Pressure Cooker Shortcut

The 4-hour stovetop method produces the best depth of flavor, but a pressure cooker (or Instant Pot) cuts that to roughly 75–90 minutes of active cooking time. The tradeoff: pressure-cooked broth won’t be quite as thick straight from the pot, and you’ll need to reduce it uncovered on the stovetop for an additional 20–30 minutes after blending to achieve the same viscosity.

Pressure Cooker Method

1. Blanch the bones as described in Step 1 (this step cannot be skipped).
2. Add cleaned bones, chicken skin, potato, onion, garlic, ginger, and 2 L (8 cups) of water to the pressure cooker.
3. Seal the lid. Cook on High Pressure for 60 minutes.
4. Allow pressure to release naturally for 15 minutes, then use a quick release for remaining pressure.
5. Remove large bones. Blend all remaining contents until smooth. Strain through a fine-mesh sieve.
6. Return strained broth to an open pot over medium-high heat. Simmer, stirring frequently, for 20–30 minutes until it reaches your desired thickness.
7. Season with tare (soy sauce, mirin, salt) as described above.

The pressure cooker version is also ideal for batch cooking: make a double batch (scale up water and chicken by 1.5x — don’t exceed your pressure cooker’s maximum fill line), freeze in 300 ml portions, and you’re one 5-minute reheating away from a weeknight bowl of kotteri ramen.

FAQ

Q: Why is my broth not thick enough after 4 hours?

A: Several factors can cause thin broth: too much water added during cooking (keep additions small — 200 ml at a time), not maintaining a strong enough boil, or not blending the potato and vegetable solids thoroughly. Check the heat — if you can’t hear an active bubbling sound, increase it. After blending and straining, you can also reduce the broth uncovered over medium-high heat for 15–20 minutes until it thickens further.

Q: Can I use chicken breast or thighs instead of bones?

A: Breast meat yields very little collagen and will not thicken the broth. Thighs are better — bone-in thighs contain enough cartilage to help — but carcasses, backs, or wings are still the most effective choice. If using thighs, add an extra half-potato to compensate for the reduced collagen.

Q: My broth solidified in the fridge. Is that normal?

A: Yes — this is a sign of success, not spoilage. A high-collagen broth converts to gelatin as it cools, producing a thick jelly. Reheat gently over medium-low heat, stirring occasionally, and it will fully liquefy within 5 minutes. If your broth does not set at all in the refrigerator, it needs more cook time or more collagen-rich ingredients.

Q: Can I make this recipe without an immersion blender?

A: Yes. Transfer batches of the cooked broth and soft solids to a countertop blender. Fill each batch no more than halfway to avoid pressure build-up from the heat. Alternatively, use a potato masher vigorously for 3–4 minutes in the pot — the result won’t be as smooth, but it will still be thick. Pass through a fine-mesh strainer in either case to remove fibrous bone fragments.

Recommended Tools

More Ramen Guides on HowToCook.jp

This article is part of the Complete Guide to Homemade Ramen — 11 Styles Compared. Once you’ve mastered the broth, explore these related guides:

• Complete Guide to Homemade Ramen — 11 Styles Compared — Start here for an overview of all major ramen styles, a tools checklist, and overseas ingredient substitutions.
• Chashu Pork Recipe — Tender Braised Pork Belly for Ramen (coming soon)
• Ajitsuke Tamago — Perfect Soft-Boiled Ramen Eggs (coming soon)

📝 About this recipe: This recipe was independently developed by the HowToCook.jp editorial team based on widely known cooking techniques and ingredient combinations. It is not an official recipe from any specific chef, cookbook author, or restaurant. Sources listed below were consulted for cooking technique and food safety information.

Sources & References

1. TENKAIPPIN Official — About Tenkaippin — Brand history, founding story, and description of the kotteri broth concept. Accessed February 2026.
2. RecipeTin Japan — Chicken Paitan Ramen — Detailed tori paitan broth technique including blanching, boiling method, and seasoning ratios. Accessed February 2026.
3. The Kitchn — Paitan-Style Ramen Recipe — Step-by-step paitan broth method with high-heat emulsification explanation and bone-smashing technique. Accessed February 2026.
4. Ang Sarap — Chicken Paitan Ramen — Broth preparation steps, safe cooling guidance, and freezing instructions for paitan broth. Accessed February 2026.
5. Sun Noodle — Chicken Paitan Ramen — Professional ramen kitchen perspective on paitan broth technique, toppings, and noodle pairing. Accessed February 2026.
6. Apex SK — How to Thicken Ramen Broth — Explanation of the three components that create broth thickness: collagen, fat emulsification, and starch. Accessed February 2026.
7. FoodSafety.gov — Safe Minimum Internal Temperatures — Official U.S. food safety guidance on poultry handling and safe temperatures. Accessed February 2026.

情報の最終確認日: 2026年02月