Rishiri Wild Kombu Seaweed | The Wasabi Company

This store requires javascript to be enabled for some features to work correctly.

Rishiri Wild Kombu Seaweed - 65g

SKU: WSB.SEAWEED.01

Sale price

Regular price £21.00
( / )
Shipping calculated at checkout

In stock

Rishiri Kombu, harvested from the pristine waters around Rishiri Island in Hokkaido, is regarded as one of Japan’s finest and most prized varieties of kombu. It is particularly valued for producing a clean, delicate and richly flavoured dashi and is a key ingredient in Kaiseki, Shojin and traditional Japanese cuisine.

Around 90% of Japan’s kombu is harvested in Hokkaido, where cold, mineral-rich waters create ideal growing conditions. Rishiri Kombu has distinctive dark brown, firm leaves and is finer and harder than Ma-Kombu. Its naturally high glutamic acid content provides a deep source of umami, while its dashi is renowned for its clear golden colour and subtly sweet, savoury flavour.

For the best results, gently heat the kombu rather than boiling it, allowing its flavour and umami to develop gradually. It is particularly suited to clear dashi, miso soup, noodle broths and delicate sauces where its refined flavour can shine.

A premium Japanese pantry essential, Rishiri Kombu is an excellent choice for chefs and home cooks looking to create authentic, beautifully balanced dashi.

Available in 65g

Store in a cool, dark place. 

  1. Wipe the kombu gently with a damp cloth to remove any surface dust. Avoid washing it, as the natural white powder on the surface contains valuable flavour compounds.
  2. Soak around 10g of kombu in 1 litre of cold water for at least 30 minutes, or preferably several hours or overnight in the fridge.
  3. Heat gently over a low to medium heat until the water reaches around 60°C. Allow the kombu to infuse slowly for 20–30 minutes.
  4. Remove the kombu before the liquid reaches a full boil. This produces a clear, delicate dashi with Rishiri Kombu’s characteristic umami and subtle sweetness.

The finished dashi can be used as a base for miso soup, noodle broths, clear soups, sauces and simmered dishes.

For a richer dashi, combine Rishiri Kombu with dried bonito flakes (katsuobushi) for the classic awase dashi.

Get some inspiration from some of our recipes that use this as an ingredient:

100% Rishiri kombu seaweed from Hokkaido (Laminaria ochotensis)

Due to the environment this product grows in, it may contain a trace amount of Fish, Mollusc and/or Crustacean particles.

Energy 299 kcal (1269 kJ), Total Fat 2.2g of which saturates 0.8g, Carbohydrate 66g of which sugars 0g (trace), Protein 4.1g, Salt 6g