Nankotsu (軟骨) means cartilage in Japanese. On a yakitori or izakaya menu, it usually refers to chicken cartilage: a small, firm bite that is enjoyed more for its crunch than for a strong meaty flavor.
Two names are worth knowing: yagen nankotsu, from the breastbone area, and hiza nankotsu, from around the knee joint. Both can be cooked and eaten, but their shapes and textures are different. You may find nankotsu grilled on skewers or deep-fried as nankotsu karaage.
If you are wondering what part of the chicken it comes from, what it tastes like, or whether you can eat it safely, this guide will walk you through the essentials.
What Does Nankotsu Mean in Japanese?
The word nankotsu is written 軟骨, the Japanese word for cartilage. Cartilage is a firm, flexible tissue found in parts of an animal’s skeleton, including around certain joints. It is different from both muscle meat and hard bone.
In Japanese food, the word can describe cartilage from different animals. But if you see just “nankotsu” on a yakitori menu, chicken cartilage is usually what the restaurant means.
Is Nankotsu Meat or Bone?
Technically, it is neither ordinary muscle meat nor hard bone: it is cartilage. That explains its unusual bite. You are not eating a tender piece of chicken thigh, and properly prepared nankotsu should not be confused with a sharp bone fragment.
Its texture is often described in Japanese as korikori (コリコリ), an expressive word for a repeated firm, satisfying crunch as you chew.
Yagen vs. Hiza Nankotsu: What’s the Difference?
The two common chicken-cartilage cuts are yagen and hiza. The easiest way to tell them apart is by where they come from and how they feel when you bite them.
| Feature | Yagen nankotsu | Hiza nankotsu |
|---|---|---|
| Part of the chicken | Breastbone / keel area | Knee-joint area |
| Typical shape | Longer and more angular | Smaller, rounded pieces |
| Texture | Lighter, crisp crunch | Firmer, denser crunch |
| Common serving style | Yakitori or fried dishes | Especially popular as karaage |
| For first-time eaters | Often an easier introduction | Best if you enjoy a strong chew |
Yagen Nankotsu: Breastbone Cartilage
Yagen nankotsu comes from cartilage around the chicken’s breastbone, also called the keel area. Its narrow, somewhat angled shape distinguishes it from the rounded pieces of hiza. The name yagen refers to a traditional Japanese grinding tool that the shape is said to resemble.
When cooked, yagen generally has a lighter crunch. Some pieces also have a little chicken meat attached, so you may experience tender meat and crisp cartilage together. It is a good place to start if you are curious about nankotsu but unsure about tougher textures.
Hiza Nankotsu: Knee-Joint Cartilage
Hiza means “knee” in Japanese. Hiza nankotsu comes from the joint area and is usually sold in relatively small, rounded pieces. It tends to have a stronger, denser bite than yagen.
That pronounced crunch makes hiza particularly well suited to deep-fried nankotsu. A crisp coating adds another texture while the cartilage stays firm inside. The exact bite will depend on the cut and preparation, so one restaurant’s nankotsu may feel different from another’s.
What Does Nankotsu Taste Like?
On its own, chicken cartilage has a mild flavor. It does not deliver the same rich, juicy taste as chicken thigh. Instead, the appeal is the contrast between a savory seasoning and the springy crunch underneath.
With shio (salt), the flavor is straightforward and lightly savory. With tare (a sweet-savory soy-based glaze), grilled nankotsu takes on more sweetness and depth. When fried, the coating and seasonings—often including garlic or soy sauce—provide much of the flavor.
Is Nankotsu Crunchy or Chewy?
Both. Think of a firm, slightly elastic crunch rather than the brittle snap of a cracker or the crispness of chicken skin. You need to chew it, and that repeated resistance is exactly what many people enjoy.
For a comparison, momo yakitori (chicken thigh) is prized for juicy meat, while nankotsu yakitori is chosen for its distinctive bite.
How Is Nankotsu Served in Japan?
You will often find nankotsu at casual izakaya pubs and yakitori restaurants, where people order several small dishes to share. Two familiar preparations are grilling and deep-frying.
Nankotsu Yakitori: Grilled Chicken Cartilage Skewers
For nankotsu yakitori, pieces of chicken cartilage are threaded onto skewers and grilled. Yagen is a common choice, sometimes with small bits of meat still attached. A little salt lets you focus on the crunchy texture; some restaurants also offer tare or a squeeze of lemon.
Hiza can also be grilled. Its firmer chew gives a noticeably different experience:
What Is Nankotsu Karaage?
Nankotsu karaage is Japanese deep-fried chicken cartilage. It is a common izakaya snack: small pieces of cartilage are seasoned, lightly coated, and fried until the outside is crisp. Hiza nankotsu is frequently used because it keeps a substantial crunch after frying.
Unlike regular chicken karaage, which centers on juicy pieces of chicken meat, nankotsu karaage is all about texture. It may be served with lemon, salt, pepper, or a dipping sauce. If you have never tried cartilage before, fried nankotsu can be an approachable introduction because of its familiar crispy coating.
Can Nankotsu Be Used in Other Dishes?
Yes. Finely chopped cartilage may be mixed into some styles of tsukune (Japanese chicken meatballs) to add little crunchy bites. The amount and type vary by recipe and restaurant.
Is Nankotsu Safe to Eat?
Chicken cartilage is an edible ingredient when it has been handled and cooked properly. As with other chicken dishes, food safety depends on safe storage, avoiding cross-contamination, and thorough cooking—especially when meat is attached.
Because nankotsu can be hard or chewy, take small bites and chew carefully. A piece that feels unusually hard or sharp should not be forced through your teeth or swallowed. People who have difficulty chewing or swallowing, or who have dental concerns, may prefer to skip it.
Can You Digest Chicken Cartilage?
Cartilage contains structural proteins, including collagen. It is food rather than ordinary bone, but its firm texture means it should be chewed well. How easily a person handles very firm foods can vary, so avoid swallowing large pieces without chewing.
Is Eating Nankotsu Good for Your Joints?
You may see claims about cartilage, collagen, and joint health online. However, eating chicken cartilage should not be assumed to prevent or treat joint problems. If you are ordering nankotsu, it makes more sense to think of it as a Japanese dish enjoyed for its flavor and texture rather than as a health supplement.
How to Order Nankotsu at a Japanese Restaurant
Look for なんこつ, 軟骨, or the romanized word nankotsu on the menu. Some restaurants specify yagen nankotsu or hiza nankotsu; others may list nankotsu karaage as a fried side dish.
To order a portion, you can say “Nankotsu o hitotsu onegaishimasu” (なんこつを一つお願いします), which means “One order of nankotsu, please.” If you want something with a gentler crunch, ask whether the restaurant serves yagen.
Quick Questions About Nankotsu
What is nankotsu in English?
Nankotsu means cartilage. On a Japanese yakitori menu, it usually means chicken cartilage.
What is the difference between yagen and hiza nankotsu?
Yagen comes from the breastbone area and is generally lighter and more angular. Hiza comes from around the knee joint and usually has a firmer, denser crunch.
Is nankotsu the same as chicken karaage?
No. Regular chicken karaage is made mainly from chicken meat. Nankotsu karaage uses cartilage, so the bite is much crunchier and less meaty.
Final Thoughts
Nankotsu is a small but memorable part of Japanese food culture. Its mild taste and korikori texture make it quite different from everyday grilled chicken. If you are new to it, start with grilled yagen for a lighter crunch—or try nankotsu karaage if you prefer something crisp and snackable.
Exploring a yakitori menu? You might also enjoy learning about kawa (chicken skin yakitori) or momo (chicken thigh yakitori). Each cut has its own texture and appeal.