Hello, I’m Kodak.
You probably know wasabi as the green paste served with sushi.
But then you hear claims such as:
“Real wasabi is not very spicy.”
“Wasabi is just green horseradish.”
“Tube wasabi is never real.”
Real wasabi comes from the Japanese wasabi plant.
Many everyday green wasabi pastes are made mainly from Western horseradish, while others are blends containing both real wasabi and horseradish.
Japanese word: わさび
Common kanji: 山葵
Romaji: wasabi
Real wasabi: the Japanese plant Eutrema japonicum, also called 本わさび (hon-wasabi)
Common substitute: Western horseradish, often mixed with mustard, color, and other ingredients
Important: not every tube or prepared paste is completely fake; some contain real wasabi
① what wasabi means in Japanese
② how to write and pronounce wasabi
③ what “real wasabi” and hon-wasabi mean
④ what imitation wasabi is usually made from
⑤ how real wasabi differs from horseradish paste
⑥ why fresh wasabi is expensive
⑦ how to identify wasabi products from their labels
⑧ how to order sushi with or without wasabi in Japanese
- 1 What Does Wasabi Mean?
- 2 How Do You Write Wasabi in Japanese?
- 3 How Do You Pronounce Wasabi?
- 4 What Is Real Wasabi?
- 5 What Is “Fake Wasabi” Made Of?
- 6 Real Wasabi vs Fake Wasabi: Quick Comparison
- 7 Real Wasabi vs Horseradish
- 8 Why Is Real Wasabi So Expensive?
- 9 Is the Wasabi at Sushi Restaurants Real?
- 10 How to Read Japanese Wasabi Labels
- 11 Three Useful Categories Instead of “Real or Fake”
- 12 What Does Fresh Real Wasabi Taste Like?
- 13 How Is Fresh Wasabi Prepared?
- 14 Wasabi vs Chili: Two Different Kinds of Heat
- 15 How Is Wasabi Used with Sushi?
- 16 How to Order Sushi Without Wasabi
- 17 Mini Conversation at a Sushi Restaurant
- 18 Common Beginner Mistakes
- 18.1 Mistake 1: Thinking Wasabi Is Simply Green Horseradish
- 18.2 Mistake 2: Calling Every Tube Product Fake
- 18.3 Mistake 3: Thinking Bright Green Means More Authentic
- 18.4 Mistake 4: Expecting Fresh Wasabi to Taste Like a Powerful Tube Paste
- 18.5 Mistake 5: Assuming Expensive Means 100% Real
- 18.6 Mistake 6: Believing “Fake Wasabi” Has No Real Wasabi
- 19 Useful Japanese Vocabulary Related to Wasabi
- 20 FAQ: Wasabi Meaning and Real vs Fake Wasabi
- 20.1 What does wasabi mean?
- 20.2 What is the Japanese word for wasabi?
- 20.3 How do you pronounce wasabi?
- 20.4 What is real wasabi?
- 20.5 What is fake wasabi made of?
- 20.6 Is wasabi just horseradish?
- 20.7 Is tube wasabi real?
- 20.8 Is restaurant wasabi real?
- 20.9 Why is real wasabi expensive?
- 20.10 What is the difference between 本わさび使用 and 本わさび入り?
- 20.11 Is real wasabi green?
- 20.12 Is real wasabi less spicy?
- 20.13 How do I ask for sushi without wasabi?
- 20.14 How do I ask whether the wasabi is real?
- 21 Summary: What Is Wasabi?
- 22 References
What Does Wasabi Mean?
Romaji: wasabi
Pronunciation: wa-sa-bi
Basic meaning 1: the Japanese wasabi plant
Basic meaning 2: the pungent condiment made from wasabi or a wasabi-style mixture
In Japanese, wasabi can refer to both the plant and the condiment.
The original plant is a perennial member of the mustard family. Its thickened underground stem—commonly called the rhizome—is finely grated and used with sushi, sashimi, soba, meat, and other dishes.
English borrowed the Japanese word wasabi. The word did not originally mean “green horseradish” in Japanese—it referred to the Japanese plant and the condiment made from it.
How Do You Write Wasabi in Japanese?
Katakana: ワサビ
Kanji: 山葵
Romaji: wasabi
In everyday writing, both わさび and ワサビ are common. The kanji 山葵 appears on menus, packaging, dictionaries, and formal descriptions, but many native speakers simply write the word in kana.
The kanji reading is not obvious from the individual characters, so beginners should memorize 山葵 = わさび as one complete word.
山 means “mountain,” while 葵 is used in plant names such as “mallow.” However, the established word is read wasabi, not by combining the ordinary readings of those two kanji.
Treat the kanji as the conventional written form of the plant name.
How Do You Pronounce Wasabi?
wa・sa・bi
Three short and fairly even Japanese morae
Avoid stretching the middle syllable into “wah-SAH-bee.” Japanese does not normally use a strong English-style stress on one syllable.
The Japanese r sound is not involved, and the final bi is short rather than a long English “bee.”
What Is Real Wasabi?
“Real wasabi” usually means the Japanese wasabi plant itself or a condiment made primarily from it.
Scientific name: Eutrema japonicum
Plant family: Brassicaceae, the mustard family
Part commonly grated: the thickened rhizome
Typical flavor: fresh aroma, gentle sweetness, complex pungency, and heat that rises through the nose
The prefix 本 (hon) means “true,” “genuine,” or “original” in this context. Japanese sources use 本わさび to distinguish Japanese wasabi from 西洋わさび (seiyō-wasabi), or Western horseradish.
English sometimes calls wasabi Japanese horseradish because the plants are related and have similar pungency.
But Japanese wasabi and Western horseradish are different plant species.
What Is “Fake Wasabi” Made Of?
The phrase fake wasabi usually refers to a wasabi-style paste made mainly from Western horseradish rather than the Japanese wasabi plant.
A typical imitation or inexpensive prepared wasabi may contain:
・mustard or mustard flavor
・green coloring
・starch or thickener
・oil
・salt
・sugar or sweetener
・flavoring
・sometimes a smaller amount of real wasabi
Some tube products are based mostly on Western horseradish. Some combine horseradish and real wasabi. Others contain a high proportion of real wasabi.
The container shape does not tell you the ingredients. Read the label.
Real Wasabi vs Fake Wasabi: Quick Comparison
| Point | Fresh real wasabi | Horseradish-based imitation |
|---|---|---|
| Main plant | Japanese wasabi, Eutrema japonicum | Western horseradish, Armoracia rusticana |
| Japanese term | 本わさび | 西洋わさび / わさび大根 |
| Typical color | Natural pale to medium green | Naturally white; usually colored green in wasabi paste |
| Aroma | Fresh, green, sweet, and complex | Sharper, more radish-like |
| Heat | Fragrant heat that rises through the nose and fades relatively quickly | Often more direct, forceful, and uniform |
| Texture | Soft, moist, and finely grated | Smooth manufactured paste or reconstituted powder |
| Availability | Limited and expensive | Widely available and inexpensive |
| Shelf life after preparation | Best soon after grating | Designed for storage and convenience |
The difference is that it also has aroma, freshness, mild sweetness, and plant-like complexity. Its heat may feel cleaner and less one-dimensional than a strong horseradish-based paste.
Real Wasabi vs Horseradish
Wasabi and horseradish belong to the same botanical family, which explains their related pungency. They are still distinct plants.
Japanese wasabi
Scientific name: Eutrema japonicum
西洋わさび (seiyō-wasabi)
Western horseradish
Also called わさび大根 (wasabi-daikon) or 山わさび (yama-wasabi) in some contexts
Scientific name: Armoracia rusticana
Western horseradish is easier to cultivate and can produce larger roots. That makes it practical for mass-produced powder and paste.
Japanese wasabi requires more specialized conditions, and high-quality water-grown wasabi is particularly demanding to cultivate.
Horseradish-based paste is a legitimate, affordable condiment when the ingredients are accurately labeled.
The problem comes from assuming that every product or restaurant paste is freshly grated Japanese wasabi when it is not.
Why Is Real Wasabi So Expensive?
Real wasabi is difficult and slow to produce compared with Western horseradish.
Cool temperatures, clean water, suitable shade, good drainage, and careful management are important.
Suitable growing areas are limited
Traditional water-grown wasabi thrives in particular mountain valleys and stream environments.
The plant takes time to mature
Growers must care for the crop for a long period before harvesting a usable rhizome.
Freshness matters
The grated aroma and pungency are volatile, so fresh wasabi must be handled and served carefully.
Supply is limited
Demand from high-end restaurants can exceed the available supply.
Japan’s Ministry of Agriculture, Forestry and Fisheries notes that hon-wasabi is difficult to find outside Japan and that even many Japanese conveyor-belt sushi restaurants use less expensive horseradish-based wasabi.
Is the Wasabi at Sushi Restaurants Real?
Sometimes yes, sometimes no, and sometimes it is a blend.
May grate fresh hon-wasabi for each customer or service.
Mid-range restaurant
May use a prepared product containing both hon-wasabi and horseradish.
Casual or conveyor-belt restaurant
Often uses an affordable prepared paste based largely on Western horseradish.
Important
Price and restaurant style provide clues, but they do not prove the ingredients.
これは本わさびですか。
Kore wa hon-wasabi desu ka?
Is this real Japanese wasabi?
How to Read Japanese Wasabi Labels
The Japan Wasabi Association explains a voluntary industry standard for two common expressions on processed products.
| Japanese label | Meaning |
|---|---|
| 本わさび使用 hon-wasabi shiyō |
Real Japanese wasabi makes up at least 50% of the wasabi ingredients under the industry’s voluntary standard |
| 本わさび入り hon-wasabi iri |
The product contains real Japanese wasabi, but it is less than 50% of the wasabi ingredients |
| No such statement | The association says the product does not use hon-wasabi under that standard |
Also inspect the complete ingredient list. Terms that may appear include:
西洋わさび — Western horseradish
わさび大根 — another name used for Western horseradish
山わさび — a name often used for horseradish, especially in Hokkaido-related contexts
からし — mustard
着色料 — coloring
香料 — flavoring
Calling it simply “fake” hides that useful information. A blend is different from a product containing no real wasabi at all.
Three Useful Categories Instead of “Real or Fake”
A real wasabi rhizome grated shortly before serving.
2. Processed wasabi containing hon-wasabi
A tube, frozen paste, or other product containing real wasabi, sometimes blended with horseradish.
3. Horseradish-based imitation wasabi
A wasabi-style condiment made without the Japanese wasabi plant.
Many convenient products contain genuine wasabi but are processed or blended to improve cost, shelf life, and consistency.
What Does Fresh Real Wasabi Taste Like?
Freshly grated hon-wasabi is not simply “hotter” or “weaker” than imitation paste. Its flavor is more layered.
green, plant-like, and slightly sweet
Pungency
travels upward through the nose rather than burning the tongue like chili
Sweetness and umami
subtle flavors appear beneath the sharpness
Short-lived freshness
the aroma and heat weaken after grating because the pungent compounds are volatile
That creates the sudden “rush to the nose” associated with wasabi. It is different from the longer-lasting tongue burn produced by chili peppers.
How Is Fresh Wasabi Prepared?
The rhizome is washed, trimmed, and grated immediately before use.
↓
wash and trim the rhizome
↓
grate it very finely with gentle circular movements
↓
allow the grated paste to rest briefly if desired
↓
serve it while the aroma and pungency are fresh
Traditional restaurants may use a fine sharkskin grater, though metal and ceramic graters are also used. The Japan Wasabi Association recommends a very fine grating surface and gentle circular movement because grating breaks the plant cells and develops the flavor and pungency.
Grating smaller amounts close to serving time preserves more of the experience people pay for when ordering real wasabi.
Wasabi vs Chili: Two Different Kinds of Heat
Sharp, volatile heat that rises into the nose and fades relatively quickly.
Chili pepper
Burning heat that remains on the tongue and mouth for longer.
This is why water may not feel like the same kind of relief for both foods. The sensations come from different chemical compounds and affect the body differently.
How Is Wasabi Used with Sushi?
In traditional nigiri sushi, the chef may place a small amount of wasabi between the topping and the rice.
＋
a small amount of wasabi
＋
vinegared sushi rice
＝
balanced nigiri sushi
The amount depends on the topping, restaurant, and customer preference.
For carefully prepared sushi, mixing a large amount into soy sauce can overpower the topping and the chef’s chosen balance. For sashimi or casual dining, some people mix a small amount while others place it directly on the food.
Use a modest amount and follow the restaurant’s style.
How to Order Sushi Without Wasabi
“No Wasabi, Please.”
わさび抜きでお願いします。
Wasabi nuki de onegai shimasu.
No wasabi, please.
Common Sushi Term: Sabi-Nuki
さび抜きでお願いします。
Sabi-nuki de onegai shimasu.
No wasabi, please.
さび (sabi) is a shortened sushi-shop term for wasabi. さび抜き is widely understood, including for children’s sushi.
“Please Put the Wasabi on the Side.”
わさびは別添えでお願いします。
Wasabi wa betsu-zoe de onegai shimasu.
Please serve the wasabi on the side.
“A Little Wasabi, Please.”
わさびは少なめでお願いします。
Wasabi wa sukuname de onegai shimasu.
A little less wasabi, please.
“Extra Wasabi, Please.”
わさびを多めにお願いします。
Wasabi o ōme ni onegai shimasu.
Extra wasabi, please.
“Is This Real Wasabi?”
これは本わさびですか。
Kore wa hon-wasabi desu ka?
Is this real Japanese wasabi?
Mini Conversation at a Sushi Restaurant
Kore wa hon-wasabi desu ka?
Is this real Japanese wasabi?
Hai, nama no hon-wasabi o surioroshite imasu.
Yes, we grate fresh Japanese wasabi.
Tomodachi no bun wa, sabi-nuki de onegai shimasu.
For my friend’s portion, no wasabi please.
Kashikomarimashita.
Certainly.
Common Beginner Mistakes
Mistake 1: Thinking Wasabi Is Simply Green Horseradish
A Japanese plant called Eutrema japonicum.
Western horseradish
A related but different plant called Armoracia rusticana.
Mistake 2: Calling Every Tube Product Fake
Some tube products contain no hon-wasabi, some contain a small amount, and others use a high proportion. The ingredient list is more useful than the package shape.
Mistake 3: Thinking Bright Green Means More Authentic
Fresh wasabi is naturally green, but an extremely bright uniform green can come from coloring. Color by itself cannot prove authenticity.
Mistake 4: Expecting Fresh Wasabi to Taste Like a Powerful Tube Paste
Fresh hon-wasabi may taste more fragrant, sweet, and complex rather than simply more aggressive.
Mistake 5: Assuming Expensive Means 100% Real
A higher price can make real wasabi more likely, but only the ingredient list, restaurant information, or seeing a rhizome grated can confirm it.
Mistake 6: Believing “Fake Wasabi” Has No Real Wasabi
Some products described casually as fake are actually blends. Distinguish imitation made without hon-wasabi from processed products that contain it.
Useful Japanese Vocabulary Related to Wasabi
wasabi; the plant or condiment
本わさび (hon-wasabi)
real Japanese wasabi
西洋わさび (seiyō-wasabi)
Western horseradish
わさび大根 (wasabi-daikon)
another Japanese name for Western horseradish
練りわさび (neri-wasabi)
prepared wasabi paste
粉わさび (kona-wasabi)
wasabi powder, commonly based on dried horseradish
おろしわさび (oroshi-wasabi)
grated-style processed wasabi
さび抜き (sabi-nuki)
without wasabi
別添え (betsu-zoe)
served separately; on the side
薬味 (yakumi)
condiment or aromatic garnish
FAQ: Wasabi Meaning and Real vs Fake Wasabi
What does wasabi mean?
Wasabi is the Japanese name for the Japanese wasabi plant and for the pungent condiment made from it or from a wasabi-style mixture.
What is the Japanese word for wasabi?
The Japanese word is わさび. It may also be written ワサビ or with the kanji 山葵.
How do you pronounce wasabi?
Pronounce it as three short Japanese morae: wa-sa-bi, without strong English-style stress.
What is real wasabi?
Real wasabi, or 本わさび, comes from the Japanese plant Eutrema japonicum. Fresh real wasabi is made by finely grating its rhizome.
What is fake wasabi made of?
Imitation wasabi is commonly based on Western horseradish and may include mustard, green coloring, starch, oil, salt, sugar, and flavoring.
Is wasabi just horseradish?
No. Japanese wasabi and Western horseradish are related members of the mustard family, but they are different plants.
Is tube wasabi real?
It depends on the product. Some tube pastes contain no real Japanese wasabi, some are blends, and others contain a high proportion of hon-wasabi.
Is restaurant wasabi real?
Some restaurants grate fresh hon-wasabi, while many casual restaurants use horseradish-based paste or a blend. Ask the restaurant when it matters to you.
Why is real wasabi expensive?
It requires specialized growing conditions, takes time and care to cultivate, has limited supply, and loses its best aroma and pungency soon after grating.
What is the difference between 本わさび使用 and 本わさび入り?
Under a Japanese industry voluntary standard, 本わさび使用 indicates at least 50% hon-wasabi within the wasabi ingredients, while 本わさび入り indicates less than 50%.
Is real wasabi green?
Yes, freshly grated hon-wasabi is naturally pale to medium green. However, color alone cannot prove authenticity because imitation paste may be colored green.
Is real wasabi less spicy?
Real wasabi is pungent, but its flavor is often described as fresher, sweeter, more aromatic, and more complex than a strong horseradish-based paste.
How do I ask for sushi without wasabi?
Say わさび抜きでお願いします or さび抜きでお願いします, meaning “No wasabi, please.”
How do I ask whether the wasabi is real?
Say これは本わさびですか, meaning “Is this real Japanese wasabi?”
Is Your Wasabi Real, Blended, or Imitation?
“Real or fake” is not a fair choice for most wasabi. Work through these checks to place yours in the right category.
The real Japanese plant, Eutrema japonicum, grated to order.
Voluntary industry standard: hon-wasabi is half or more of the wasabi ingredient.
Contains some real hon-wasabi, but horseradish likely makes up most of it.
No hon-wasabi under the association\u2019s standard.
※ Based on the Japan Wasabi Association’s voluntary labeling standard described in this article. A blend containing real wasabi is different from a product with none at all.
Summary: What Is Wasabi?
Wasabi is written わさび, ワサビ, or 山葵.
● Real wasabi
Real Japanese wasabi is 本わさび (hon-wasabi), the plant Eutrema japonicum.
● Imitation wasabi
Many affordable wasabi-style pastes are based on Western horseradish with mustard, color, and other ingredients.
● Blended products
Some processed pastes contain both hon-wasabi and horseradish, so “real or fake” is not always a simple two-way choice.
● Main flavor difference
Fresh hon-wasabi has fragrant, sweet, complex pungency. Horseradish-based paste is often sharper and more uniform.
● Best way to check
Read the ingredient list, look for Japanese label wording, or ask the restaurant.
● Useful phrase
これは本わさびですか。
Kore wa hon-wasabi desu ka?
Is this real Japanese wasabi?
Hon-wasabi is the Japanese plant; imitation wasabi is usually horseradish-based; many prepared products are blends.
Checking the ingredients gives you a much clearer answer than judging the paste only by its color.
References
- Japan Wasabi Association: Characteristics and Processed Wasabi — explains hon-wasabi, Western horseradish, processed wasabi, and the voluntary 本わさび使用 / 本わさび入り standard.
- Japan Wasabi Association: How to Grate and Store Wasabi — explains regional flavor differences within the rhizome and fine circular grating.
- Japan Wasabi Association: History of Wasabi — history of Japanese wasabi, powdered wasabi, Western horseradish, and tube paste.
- Ministry of Agriculture, Forestry and Fisheries: Fresh Wasabi in Shizuoka — explains the rarity and difficult cultivation of hon-wasabi and the widespread use of less expensive horseradish.
- Ministry of Agriculture, Forestry and Fisheries: Shizuoka Wasabi Cultivating Region — describes wasabi as a native Japanese plant first cultivated in Shizuoka about 400 years ago.
- Kotobank: 山葵 — dictionary meanings, writing, historical examples, and use as both the plant and condiment.
- Kanjipedia: 山葵 — reading and botanical definition.
- Kikkoman: Wasabi Glossary — use with sushi and sashimi, volatile pungency, and common tube paste.
- S&B Foods: Prepared Wasabi Product Example — an example ingredient list showing horseradish, wasabi, coloring, and other components in a prepared tube paste.
