Food · Fermented foods
Tatsoi (Tah Tsai)
タアサイ (Tā-sai)
Also known as: Tatsoi, Tā-sai, Brassica rapa var. narinosa, タアサイ, 塌菜
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| Category | Food |
|---|---|
| Japanese labeling name | タアサイ |
| Common Japanese notations | タアサイ, 塌菜, ターサイ |
| Origin | Brassica rapa var. narinosa, originally Chinese leafy green now well-established in modern Japanese cultivation; flat rosette growth pattern with dark green leaves |
| Typical functions | Stir-fry and Chinese-influenced cooking, Salad green, Hot pot ingredient |
| Regulatory status in Japan | Standard agricultural product labeling. Not a designated allergen. |
Tatsoi (タアサイ / 塌菜) is Brassica rapa var. narinosa, a Chinese leafy green well-established in modern Japanese cultivation with year-round availability. The OEM positioning is mainstream Asian leafy green for stir-fry and salad applications.
Classification
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Product applications
Functions
Regulatory tags
Origin
Used in (typical product categories)
Finished-product categories that commonly include this ingredient in Japanese-market formulations.
- Fresh tatsoi (year-round)
What it is
Brassica rapa var. narinosa, dark green flat rosette form.
Typical uses in Japanese products
Stir-fry, hot pot, salad.
For OEM: fresh retail year-round.
Regulatory classification in Japan
Standard food labeling. Not a designated allergen.
Regulatory classification in other markets
| EU | Imported as tatsoi. Established global Asian green category. |
|---|---|
| USA | Established US tatsoi retail. Often in salad mixes. |
| China | China is major tatsoi producer. |
| Korea | Niche specialty positioning. |
Example products
Example finished products will be added after verification.
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Sharing similar functions
Ingredients that overlap on functional benefit tags.
From the same origin
Other ingredients that share an origin classification.
References
- MEXT Standard Tables of Food Composition — タアサイ
Last updated: 2026-04-28. Ingredient entries are reviewed at least annually against current regulatory listings.