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.
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Classification
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Product applications
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Regulatory tags
Origin
Common OEM product categories
Finished-product categories where Japanese OEM manufacturers commonly formulate with this ingredient.
- Fresh tatsoi (year-round)
Ingredient profile
Brassica rapa var. narinosa, dark green flat rosette form.
OEM applications
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. |
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Quick answers
- What is Tatsoi (Tah Tsai)?
- 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.
- What is the regulatory status of Tatsoi (Tah Tsai) in Japan?
- Standard agricultural product labeling. Not a designated allergen.
- What products typically use Tatsoi (Tah Tsai)?
- Fresh tatsoi (year-round)
- Where does Tatsoi (Tah Tsai) come from?
- Brassica rapa var. narinosa, originally Chinese leafy green now well-established in modern Japanese cultivation; flat rosette growth pattern with dark green leaves
- What is the INCI / JSCI labeling name for Tatsoi (Tah Tsai)?
- JSCI: タアサイ
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References
- 文部科学省 (Ministry of Education, Culture, Sports, Science and Technology) 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.