Food · Seasonings
Katsuo Dashi (Honkarebushi — 2-Year-Aged Premium Bonito Stock)
本枯節かつおだし (Honkarebushi katsuo dashi)
Also known as: Premium Katsuo Dashi, Honkare-bushi Dashi, Aged Bonito Stock
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| Category | Food |
|---|---|
| Japanese labeling name | かつおだし |
| Common Japanese notations | 本枯節だし, 本枯れ節だし, ほんかれぶしだし |
| Origin | Brewed from honkarebushi (smoked, sun-dried, and mold-fermented for 6 months to 2+ years) shaved into hot water |
| Typical functions | Premium clear soup (osumashi) base, High-end nimono and chawanmushi stock, Specialty foodservice and kaiseki cooking |
| Regulatory status in Japan | Honkarebushi is the highest grade of katsuobushi under traditional classification. Dashi made from it is treated as a standard culinary stock — no specific JAS standard, but raw-material grade is regulated by industry self-classification. |
Honkarebushi katsuo dashi is the most refined form of Japan's signature umami stock — clear, fragrant, and made from honkarebushi (本枯節), bonito blocks that have been smoked, sun-dried, and inoculated with Aspergillus glaucus mold over 6 months to 2+ years to remove residual moisture and break down fats. The resulting dashi is dramatically clearer and more aromatic than dashi from young arabushi (荒節), with a refined inosinate-driven umami that defines kaiseki and high-end Japanese cooking.
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Classification
Tags below link to other ingredients sharing the same attribute, so you can pivot from one ingredient to its peers.
Product applications
Functions
Regulatory tags
Common OEM product categories
Finished-product categories where Japanese OEM manufacturers commonly formulate with this ingredient.
- Premium retail liquid dashi
- Kaiseki and ryōtei foodservice supply
- High-end packaged soup base
- Premium umami concentrate ingredient
Ingredient profile
Honkarebushi katsuo dashi is brewed by shaving honkarebushi (well-aged katsuobushi) into water heated to roughly 80°C and steeping for 1–3 minutes before straining. The brief, controlled extraction draws out inosinate (IMP) and aromatic compounds without extracting bitterness or astringency from the dried fish.
Honkarebushi differs from the more common arabushi (荒節) in two ways: (1) it is mold-cultured (荒節 is only smoked and dried), and (2) it is aged 6 months to 2+ years (vs. 1–2 months for arabushi). The mold culture and aging consume residual fat and moisture, producing blocks so hard they ring when struck. The resulting dashi is clearer, more aromatic, and lower in fishy notes than arabushi dashi.
Industrially, honkarebushi-based dashi is supplied as (a) liquid concentrates, (b) frozen single-strength dashi, and (c) premium powdered dashi where the honkarebushi extract is the primary umami source. It is the dashi of choice for kaiseki cuisine, high-end clear soups, and premium chawanmushi and nimono.
OEM applications
Clear soup (osumashi) and suimono — the high aromatic clarity of honkarebushi dashi defines this dish category. Premium ryōtei and kaiseki restaurants typically use honkarebushi dashi for all clear-soup applications.
Premium chawanmushi (savory egg custard), nimono (simmered dishes), and tamagoyaki (rolled omelet) where the dashi flavor is prominent and unmasked.
For OEM and high-end packaged products: premium retail liquid dashi, single-portion frozen dashi for chef-quality at-home cooking, and premium soup bases for ready-meals and kaiseki bento. Honkarebushi raw-material certification is a meaningful consumer-facing claim.
Regulatory classification in Japan
No specific JAS standard for dashi liquid; honkarebushi raw-material classification follows traditional industry definitions.
Labeling: 'かつおだし' (katsuo dashi) is the standard JSCI labeling name. 'Honkarebushi' designation requires verifiable use of mold-cultured aged katsuobushi as the raw material.
Allergens: katsuobushi contains fish (mackerel/bonito); fish allergen disclosure is required.
Regulatory classification in other markets
| EU | Imported as fermented/dried fish-based broth concentrate. Allergen labeling for fish required. Aspergillus glaucus mold use must be disclosed in ingredient documentation but is not a regulatory restriction. |
|---|---|
| USA | Imported under FDA standard food procedures. 'Bonito broth' or 'fermented bonito stock' wording on labels. Fish allergen disclosure required. |
| China | Imported under GACC rules for processed seafood-based seasonings. Premium positioning in Chinese gourmet retail. |
| Korea | Imported as gourmet soup-stock category. Korean cuisine uses anchovy-based dashi (멸치다시) more commonly, but premium katsuo dashi has a foodservice market. |
Market reference formulations
Example finished products will be added after verification of producer's honkarebushi sourcing (single-origin vs. blended) and aging duration certification.
All brand names and product names referenced anywhere on this site are the property of their respective owners. Example entries are provided for informational purposes only and do not imply endorsement.
Seasonality & supply calendar
- Harvest months
- Source katsuobushi: 4-6 month curing process, available year-round; spring-run and autumn-run katsuo provide raw fish
- Peak supply
- Continuous
- Off-season
- None — honkare is shelf-stable for years
Source: 全国削節工業協会. Kagoshima 枕崎 and Shizuoka 焼津 are primary production centers.
Storage requirements
How the receiving OEM facility needs to handle inbound raw material.
- Temperature
- Sealed at room temperature for honkare grade; refrigerated for削り節
- Conditions
- Mold-cured for 4+ rounds; protect from humidity
- Shelf life
- Whole honkare: 24+ months; 削り節 sealed: 6 months
Supply concentration
Where this ingredient comes from — useful for single-source-risk planning.
- Primary regions
- Kagoshima (Makurazaki — approximately 50% national share per 枕崎水産加工業協同組合 industry data; Kagoshima Prefecture combined Makurazaki + Ibusuki >70%; 第168号 枕崎鰹節 GI-registered by 農林水産省 (Ministry of Agriculture, Forestry and Fisheries) on 2025-03-18), Shizuoka (Yaizu)
- Import dependence
- Source bonito catch is partly imported (Maldives, Indonesia); curing always in Japan
全国削節工業協会
Certifications commonly available
Certification schemes commonly obtainable for this raw material. Always confirm the specific supplier's current certificate before contracting.
| Scheme | Availability | |
|---|---|---|
| Halal | Unavailable | Mold-fermented (Aspergillus glaucus) cannot align with Halal slaughter chain |
| Kosher | On-request | Bonito has scales/fins; processing chain cert needed |
Documented adulteration risks
Known fraud / adulteration patterns reported by regulators or industry bodies. Specify CoA params and screening tests on every PO.
- 荒節 (un-mold-cured) sold as 本枯節 grade
Detection: Visual mold marker (4 moldings = 本枯節); supplier process audit
全国削節工業協会
Alternative ingredients
Related ingredients commonly evaluated as substitutes.
Quick answers
- What is Katsuo Dashi (Honkarebushi — 2-Year-Aged Premium Bonito Stock)?
- Honkarebushi katsuo dashi is the most refined form of Japan's signature umami stock — clear, fragrant, and made from honkarebushi (本枯節), bonito blocks that have been smoked, sun-dried, and inoculated with Aspergillus glaucus mold over 6 months to 2+ years to remove residual moisture and break down fats. The resulting dashi is dramatically clearer and more aromatic than dashi from young arabushi (荒節), with a refined inosinate-driven umami that defines kaiseki and high-end Japanese cooking.
- What is the regulatory status of Katsuo Dashi (Honkarebushi — 2-Year-Aged Premium Bonito Stock) in Japan?
- Honkarebushi is the highest grade of katsuobushi under traditional classification. Dashi made from it is treated as a standard culinary stock — no specific JAS standard, but raw-material grade is regulated by industry self-classification.
- What products typically use Katsuo Dashi (Honkarebushi — 2-Year-Aged Premium Bonito Stock)?
- Premium retail liquid dashi / Kaiseki and ryōtei foodservice supply / High-end packaged soup base / Premium umami concentrate ingredient
- Where does Katsuo Dashi (Honkarebushi — 2-Year-Aged Premium Bonito Stock) come from?
- Brewed from honkarebushi (smoked, sun-dried, and mold-fermented for 6 months to 2+ years) shaved into hot water
- What is the INCI / JSCI labeling name for Katsuo Dashi (Honkarebushi — 2-Year-Aged Premium Bonito Stock)?
- JSCI: かつおだし
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Take the next step
FAQ for OEM buyers
Q. What's the difference between honkarebushi dashi and standard katsuo dashi?
Standard katsuo dashi is typically made from arabushi (荒節) — bonito that has been smoked and dried over 1–2 months but not mold-cultured. Honkarebushi (本枯節) is arabushi that has then been inoculated with Aspergillus glaucus mold and sun-dried in repeated cycles for 6 months to 2+ years. The mold culture consumes residual fat and water, leaving a harder, more refined raw material. The resulting dashi is clearer, more aromatic, and significantly more expensive — typically 2–4× the cost of arabushi-based dashi at the raw-material level.
Sources · Last reviewed: 2026-04-28
- Japanese Bonito Industry Association honkarebushi grade documentation
- 文部科学省 (Ministry of Education, Culture, Sports, Science and Technology) Standard Tables of Food Composition — 17019 (荒節) vs. 17131 (本枯れ節) dashi composition
Q. Why is honkarebushi dashi standard for kaiseki cuisine?
Kaiseki cuisine prizes clarity, restraint, and aroma over assertive flavor. The mold-aged honkarebushi delivers a higher ratio of aromatic compounds to fishy and astringent notes, producing a dashi that can carry a clear soup (osumashi) without muddying it visually or aromatically. The mold-aging process also reduces residual fat that would otherwise leave a film on the soup surface — a meaningful consideration for the visual standards of kaiseki presentation.
Sources · Last reviewed: 2026-04-28
- Editorial — kaiseki tradition and dashi quality reference
Industry-knowledge claim — not yet pinned to a single primary source
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Official regulatory databases
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References
- 文部科学省 (Ministry of Education, Culture, Sports, Science and Technology) Standard Tables of Food Composition — かつおだし 本枯れ節 (17131)
- Japanese Bonito Industry Association honkarebushi grade documentation
- Editorial — kaiseki dashi tradition reference
Last updated: 2026-04-28. Ingredient entries are reviewed at least annually against current regulatory listings.