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Tonkotsu

Tonkotsu is a Japanese term meaning “pork bone” that commonly refers to a rich pork-bone broth used as the base for tonkotsu ramen.

By Ethan Anderson| Reviewed by Olivia Bennett, Standards & Fact-Checking Lead| Updated July 26, 2026|2 min read| Fact-checked

Tonkotsu is a Japanese term meaning “pork bone” that commonly refers to a rich pork-bone broth used as the base for tonkotsu ramen. The style is especially associated with Kyushu, particularly Fukuoka, and is known for its cloudy, creamy appearance from long boiling of pork bones.

Meaning and usage

Tonkotsu is a Japanese word meaning pork bone. In culinary use, it usually refers to a broth made from pork bones and related parts, especially in ramen contexts.

Tonkotsu ramen

Tonkotsu ramen is a ramen style built around a pork-bone broth that is simmered or boiled for many hours. The broth is typically opaque and creamy because collagen, fat, and marrow emulsify into the liquid.

Origins and regional association

The style is commonly linked to Kyushu, particularly Fukuoka Prefecture and Hakata. It later spread widely across Japan and became popular in Japanese restaurants internationally. Tonkotsu ramen is also widely available in Canadian cities with Japanese and broader East Asian restaurant scenes, and it is a familiar menu term for Canadian diners interested in ramen culture.

Key facts

  • Tonkotsu literally means “pork bone” in Japanese.
  • In food contexts, it usually refers to a pork-bone broth rather than the bones themselves.
  • Tonkotsu ramen is known for a rich, opaque broth made by boiling pork bones for many hours.
  • The style is strongly associated with Kyushu and Fukuoka, especially Hakata-style ramen.
  • It is often confused with tonkatsu, which is a fried pork cutlet dish.
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Canadian context

Tonkotsu ramen is widely available in Canadian cities with Japanese and broader East Asian restaurant scenes, and it is a familiar menu term for Canadian diners interested in ramen culture.

Frequently asked questions

What does tonkotsu mean?
It means “pork bone” in Japanese.
What is tonkotsu ramen?
It is a Japanese ramen style made with a rich pork-bone broth.
Where did tonkotsu ramen originate?
It is most commonly associated with Fukuoka on the island of Kyushu, Japan.
Why is tonkotsu broth cloudy?
Long boiling of pork bones emulsifies fat, collagen, and marrow into the broth.
Is tonkotsu the same as tonkatsu?
No. Tonkatsu is a fried pork cutlet dish, while tonkotsu refers to pork bones or pork-bone broth.

References

  1. Spiegato — https://spiegato.com/en/what-is-tonkotsu
    Supports: Tonkotsu as Japanese noodle soup/broth; pork-bone preparation; Kyushu association
  2. EJJI Ramen — https://ejjiramen.com/tonkotsu-vs-tonkatsu/
    Supports: Literal meaning of tonkotsu and its use as pork-bone broth; cooking time
  3. Mashed — https://www.mashed.com/1334619/what-is-tonkotsu-what-does-it-taste-like/
    Supports: Meaning of tonkotsu; cloudy broth; origin in Kurume/Fukuoka around 1937
  4. Tasting Table — https://www.tastingtable.com/1440277/important-difference-tonkatsu-tonkotsu/
    Supports: Distinction between tonkatsu and tonkotsu; tonkotsu as pork-bone ramen broth
  5. Hanaya Hibachi Sushi — https://hanayafm.com/blog/tonkotsu-ramen-a-short-overview/
    Supports: Fukuoka/Kyushu association; Hakata ramen; pork-bone broth description