利尻昆布 (Rishiri Kombu)

Rishiri-Rebun waters produce kombu with mineral and glutamate balance no other origin replicates; designated Hokkaido regional brand.
Glutamate 1.5–3.5% dry weight; iodine 200–600 mg/100g; dashi clarity ranks among highest of all kombu varieties.
Premium dashi packets, kaiseki-restaurant supply, kombu-extract moisturising cosmetics.
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.
| 日本 | Food product; iodine content disclosure under Japan food labelling rules |
|---|---|
| 欧盟 | Food import; iodine cap monitoring (EU recommends max 600 µg/day intake) |
| 美国 | GRAS for food; FDA Prior Notice required |
| 中国 | GACC food facility registration; verify import allowance |