Japan Ingredient Glossary

Cosmetics · Marine ingredients

Saccharina Japonica Extract

コンブエキス (Konbu ekisu)

Also known as: Kombu Extract, Japanese Kelp Extract

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Why now · 2022 — ongoing

Premium Dashi: Kombu, Katsuobushi, and the Umami Foundation Going Mainstream

Premium dashi (Japanese stock from kombu + katsuobushi) is now mainstream in Western fine dining. Sourcing the right grade for each application is the buyer's challenge.

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At a glance

CategoryCosmetics
INCI nameSaccharina Japonica Extract / Laminaria Japonica Extract
Japanese labeling nameコンブエキス
Common Japanese notationsコンブエキス, 昆布エキス
OriginMarine (Saccharina japonica, kombu)
Typical functionsSkin conditioning, Moisturizing, Food flavoring (umami source)
Regulatory status in JapanCosmetic ingredient listed in the JSCI (Japanese Cosmetic Industry Association) labeling name dictionary. The whole seaweed is also a foundational food ingredient for dashi.

Kombu — Saccharina japonica — is the foundational kelp of Japanese cuisine, the primary source of dashi umami, and one of the most economically important seaweed crops in Japan. As a cosmetic ingredient, kombu extract brings mineral-rich marine storytelling to skincare lines.

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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.

Common OEM product categories

Finished-product categories where Japanese OEM manufacturers commonly formulate with this ingredient.

  • Face toners and essences
  • Body and hair products
  • Dashi and culinary applications

Ingredient profile

Saccharina japonica extract is produced by water or hydro-alcoholic extraction of dried Saccharina japonica blades. The extract contains polysaccharides including alginates and laminarin, minerals, free amino acids including glutamic acid, and fucoidan at trace-to-moderate levels.

The species was previously classified under Laminaria; older INCI entries using Laminaria Japonica Extract refer to the same species.

OEM applications

In Japanese cosmetics, kombu extract appears in facial toners, essences, body washes, and hair products. The ingredient carries marine and coastal-Hokkaido storytelling — Hokkaido being the primary kombu production region.

In food applications, dried kombu is the essential dashi ingredient, used alongside katsuobushi (bonito flakes) in the base stock of Japanese cuisine. Food-grade kombu is regulated separately from cosmetic-grade extracts.

Regulatory classification in Japan

Listed in the JSCI Japanese Cosmetic Ingredient Codex under コンブエキス and permitted as a cosmetic ingredient.

Regulatory classification in other markets

EUListed in CosIng under Saccharina Japonica Extract and the previous name Laminaria Japonica Extract. Permitted for cosmetic use.
USAINCI recognized by PCPC.
ChinaPermitted per IECIC listings.
KoreaPermitted as a cosmetic ingredient under the KFDA / MFDS system.

Market reference formulations

Example finished products will be added after each product's current full ingredient list has been verified.

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
Wild: July – September (Hokkaido peak)
Peak supply
August
Off-season
Year-round via dried storage; extract is shelf-stable

Source: 農林水産省 漁業センサス. Hokkaido produces approximately 85% of Japan's kombu (per 海面漁業生産統計). Two-year cultivation cycle for cultivated 養殖昆布.

Storage requirements

How the receiving OEM facility needs to handle inbound raw material.

Temperature
Room temperature for dry kombu; refrigerated for liquid extract
Conditions
Sealed against humidity; dried kombu is moisture-sensitive (may bloom mannitol crystals)
Shelf life
Dried 24 months sealed; liquid extract 18 months

Supply concentration

Where this ingredient comes from — useful for single-source-risk planning.

Primary regions
Hokkaido (~85% of national kombu per 海面漁業生産統計; Iwate is #2) — heavy single-prefecture concentration
Import dependence
100% domestic; supply concentration is the primary risk factor

農林水産省 漁業センサス

Certifications commonly available

Certification schemes commonly obtainable for this raw material. Always confirm the specific supplier's current certificate before contracting.

SchemeAvailability
Organic JASRareWild-harvested kombu is difficult to certify organic
HalalCommon
KosherCommon
VeganInherent

Alternative ingredients

Related ingredients commonly evaluated as substitutes.

Quick answers

What is Saccharina Japonica Extract?
Kombu — Saccharina japonica — is the foundational kelp of Japanese cuisine, the primary source of dashi umami, and one of the most economically important seaweed crops in Japan. As a cosmetic ingredient, kombu extract brings mineral-rich marine storytelling to skincare lines.
What is the regulatory status of Saccharina Japonica Extract in Japan?
Cosmetic ingredient listed in the JSCI (Japanese Cosmetic Industry Association) labeling name dictionary. The whole seaweed is also a foundational food ingredient for dashi.
What products typically use Saccharina Japonica Extract?
Face toners and essences / Body and hair products / Dashi and culinary applications
Where does Saccharina Japonica Extract come from?
Marine (Saccharina japonica, kombu)
What is the INCI / JSCI labeling name for Saccharina Japonica Extract?
INCI: Saccharina Japonica Extract / Laminaria Japonica Extract / JSCI: コンブエキス

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From the same origin

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Regulatory guidance

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FAQ for OEM buyers

Q. What INCI names cover kombu extract for cosmetic labeling?

Both 'Saccharina Japonica Extract' and 'Laminaria Japonica Extract' are recognized INCI names — the species was reclassified from Laminaria to Saccharina, and both names remain in the CosIng inventory. Confirm with the supplier which name matches the COA before printing labels.

Sources · Last reviewed: 2026-04-26

  • CosIng database — INCI: Saccharina Japonica Extract
  • CosIng database — INCI: Laminaria Japonica Extract
Q. Is heavy-metal (arsenic, iodine) testing standard for kombu cosmetic extracts?

Seaweed naturally accumulates iodine and trace arsenic, so cosmetic-grade kombu extract suppliers typically provide a heavy-metal panel and iodine content on the COA. Buyers should request these specifically and confirm compliance with destination-market cosmetic ingredient limits.

Sources · Last reviewed: 2026-04-26

  • 厚生労働省 (Ministry of Health, Labour and Welfare) — Standards for Cosmetics (heavy metal limits)
Q. Are Hokkaido-origin claims for kombu extract verifiable?

Hokkaido is the dominant Japanese kombu production region (Ma-kombu, Rishiri-kombu, Rausu-kombu, etc.), and origin documentation is typically supplied by reputable processors. Some Hokkaido kombu varieties are registered under the 農林水産省 (Ministry of Agriculture, Forestry and Fisheries) GI scheme for food use; cosmetic-extract origin claims should retain supplier provenance documentation.

Sources · Last reviewed: 2026-04-26

  • 農林水産省 (Ministry of Agriculture, Forestry and Fisheries) — Geographical Indication (GI) Registry
Q. Is kombu extract compatible with anionic surfactants in body wash?

Yes, water-soluble kombu extracts are compatible with standard anionic, amphoteric, and non-ionic surfactant systems at 0.1–3% use levels. Polysaccharide-rich extracts may marginally increase viscosity, which can be useful or require thickener adjustment.

Sources · Last reviewed: 2026-04-26

  • Industry knowledge — Japanese body-wash formulation

Industry-knowledge claim — not yet pinned to a single primary source

Use cases

  • Facial toner / essence

    Positioning
    Marine-themed moisturizing line with Hokkaido provenance
    Typical usage level
    0.5–3%

    Sources

    • Industry knowledge — Japanese marine-themed skincare

    Industry-knowledge claim — not yet pinned to a single primary source

  • Sheet mask

    Positioning
    Mineral-rich mask line, often paired with other algae/marine extracts

    Sources

    • Industry knowledge — Japanese mask market

    Industry-knowledge claim — not yet pinned to a single primary source

  • Hair conditioner / treatment

    Positioning
    Marine-mineral haircare with smoothness/moisture positioning

    Sources

    • Industry knowledge — Japanese haircare market

    Industry-knowledge claim — not yet pinned to a single primary source

  • Body wash

    Positioning
    Marine-spa positioning body cleanser line

    Sources

    • Industry knowledge — Japanese body-wash category

    Industry-knowledge claim — not yet pinned to a single primary source

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Official regulatory databases

External links to public Japanese / international regulatory authorities. We are not affiliated.

References

  1. JSCI (Japanese Cosmetic Industry Association) labeling name directory — コンブエキス
  2. EU CosIng entry: Saccharina Japonica Extract

Last updated: 2026-04-22. Ingredient entries are reviewed at least annually against current regulatory listings.

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