Rausu Kombu (Premium Eastern Hokkaido Kelp)
羅臼昆布 (Rausu Kombu)
Why source from Japan
The Shiretoko-Rausu coast is a UNESCO World Natural Heritage region; cold Okhotsk currents produce slow-growing premium kombu no other origin matches.
Key spec
Glutamate 2.5–4.0% dry weight (highest among Japanese kombu); iodine 250–600 mg/100g; lipid carry-over yields characteristic richness.
Typical end-product
Premium kaiseki dashi, top-tier kombu candy / kelp tea, fine-dining hospitality export.
At a glance
- Suppliers listed
- 2 suppliers
- Typical MOQ
- 10–50 kg dried kelp; 1–10 kg extract
- Typical lead time
- 10–16 weeks (allocation-constrained)
- Regions of origin
- Hokkaido (Shiretoko-Rausu 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 Diabolica Extract
- Japanese name
- 羅臼昆布
- Romaji
- Rausu Kombu
About this ingredient
Premium kombu variety from the Shiretoko-Rausu coast in eastern Hokkaido. Distinguished by an exceptionally rich, slightly fattier dashi character — sometimes called the 'king of kombu' in Kansai dashi circles. The cold Sea of Okhotsk waters around Rausu and the steep underwater shelf produce slow-growing kombu with thick, deeply flavoured fronds. Allocation-controlled supply through the Rausu Fisheries Cooperative; commands the highest per-kg pricing of any Japanese kombu variety. Distinct from the existing rishiri-kombu and ma-kombu entries in profile and price.
Regulatory status
| Japan | Food product; iodine-content disclosure under Japan food labelling rules |
|---|---|
| EU | Food import; iodine cap monitoring (EU recommends ≤600 µg/day) |
| United States | GRAS; FDA Prior Notice required |
| China | GACC food facility registration |
Looking for alternatives?
Common reasons buyers swap to a different ingredient — and what we'd suggest based on this ingredient's profile.
Vegan / plant-based alternatives
Rausu Kombu (Premium Eastern Hokkaido Kelp) is animal-derived. If you need a non-animal source with similar functions, consider:
Sansho Pepper
山椒
Zanthoxylum piperitum source; INCI Zanthoxylum Piperitum Fruit Extract; MOQ from 1–10 kg (dried peppercorn); 100 g – 5 kg (powder).
Plant-based· shares 3 categories
Wasabi Powder
山葵粉末
Wasabia japonica (Eutrema japonicum) source; INCI Wasabia Japonica Root Powder; MOQ from 1–10 kg (powder); 100 kg+ (bulk paste).
Plant-based· shares 3 categories
Shio Koji
塩麹
MOQ from 20–100 kg.
Plant-based· shares 3 categories
Easier China regulatory path
Rausu Kombu (Premium Eastern Hokkaido Kelp) faces a more restrictive regulatory pathway in China. These alternatives have a simpler status in that market:
Japanese Abalone (Awabi)
鮑 / アワビ
Protein 18-22%; collagen-rich; taurine 750-950 mg/100g; mother-of-pearl shell upcycled to cosmetic-grade calcium carbonate.
Simpler in China· shares 4 categories
Sansho Pepper
山椒
Zanthoxylum piperitum source; INCI Zanthoxylum Piperitum Fruit Extract; MOQ from 1–10 kg (dried peppercorn); 100 g – 5 kg (powder).
Simpler in China· shares 3 categories
Wasabi Powder
山葵粉末
Wasabia japonica (Eutrema japonicum) source; INCI Wasabia Japonica Root Powder; MOQ from 1–10 kg (powder); 100 kg+ (bulk paste).
Simpler in China· shares 3 categories
When does it make sense to swap an ingredient? Read the swap guide →
Japanese suppliers
Riken Vitamin Co., Ltd.
理研ビタミン株式会社
Chuo, TokyoEst. 1949English supportExport experienceFSSC 22000ISO 9001Premium Rausu kombu for top-tier dashi extracts
Kubara Honke / Kayanoya
久原本家 / 茅乃舎
Kasuya, FukuokaEst. 1893English supportExport experienceLimited-allocation premium dashi packs
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Last updated: 2026-05-05