Japan Ingredient Sourcing
Raw material / 原材料Marine functional ingredients

Rishiri Kombu (Premium Hokkaido Kelp)

利尻昆布 (Rishiri Kombu)

Send inquiry

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.

Read the trend report

Why source from Japan

Rishiri-Rebun waters produce kombu with mineral and glutamate balance no other origin replicates; designated Hokkaido regional brand.

Key spec

Glutamate 1.5–3.5% dry weight; iodine 200–600 mg/100g; dashi clarity ranks among highest of all kombu varieties.

Typical end-product

Premium dashi packets, kaiseki-restaurant supply, kombu-extract moisturising cosmetics.

At a glance

Suppliers listed
1 supplier
Typical MOQ
10–50 kg dried kelp; 1–10 kg extract
Typical lead time
8–14 weeks (harvest-dependent allocation)
Regions of origin
Hokkaido (Rishiri Island, Rebun Island, Wakkanai coast)
Category
Marine functional ingredients
Harvest season
July – September (drying through October)
Japan regulatory status
Food product; iodine content disclosure under Japan food labelling rules
INCI name
Saccharina Ochotensis Extract
Japanese name
利尻昆布
Romaji
Rishiri Kombu

About this ingredient

Premium kombu variety from the waters around Rishiri and Rebun islands in northern Hokkaido. Distinguished by clarity and depth of dashi (less sweet than ma-kombu, more refined than hidaka). Traditionally the kombu of choice for Kyoto kaiseki cuisine and ceremonial-grade dashi. Production is allocation-constrained — annual harvest is closely controlled by local fisheries cooperatives. Used in premium dashi, soup base, and kombu extract for cosmetic moisturisation lines.

Regulatory status

JapanFood product; iodine content disclosure under Japan food labelling rules
EUFood import; iodine cap monitoring (EU recommends max 600 µg/day intake)
United StatesGRAS for food; FDA Prior Notice required
ChinaGACC food facility registration; verify import allowance

Looking for alternatives?

Common reasons buyers swap to a different ingredient — and what we'd suggest based on this ingredient's profile.

When does it make sense to swap an ingredient? Read the swap guide →

Japanese suppliers

Inquire about Rishiri Kombu (Premium Hokkaido Kelp)

Disclaimer

Japan Ingredient Sourcing Platform introduces overseas buyers to Japanese ingredient manufacturers. The platform is an information service only and is not a party to any purchase, supply, or manufacturing contract between buyer and seller.

Information shown — including company details, product descriptions, regions of origin, minimum order quantities, lead times, certifications, and regulatory references — is compiled primarily from publicly available sources and manufacturer websites. Specifications change without notice; buyers are expected to verify current specifications, pricing, certification status, and regulatory compliance directly with each manufacturer before placing orders or signing contracts.

The platform operator is not licensed to provide legal, regulatory, customs, tax, or professional advice. References to third-party companies, products, certifications, trademarks, and geographical indications (GI) are factual and do not imply endorsement, sponsorship, or affiliation. All trademarks are the property of their respective owners.

Last updated: 2026-05-04

Inquire about Rishiri Kombu (Premium Hokkaido Kelp)