Skip to content

Kombu Tsukudani (A Japanese Seaweed Relish)

Kombu Tsukudani 1

This dish is a Japanese preparation, very much like certain sort of Korean Banchan, which uses the edible seaweed known as Kombu for its main ingredient. Like its Korean counterparts, it keeps very well, can be used as a cold side-dish, and is particularly good as a flavorful topping for plain rice. It is not the prettiest dish in the world, perhaps, but it certainly packs a lot of flavor… 

A Tsukudani made with Kombu often includes other umami marine ingredients such as Katsuobushi (dried, smoked tuna flakes) while a preparation consisting of Kombu boiled down in Japanese soy sauce is more properly called ‘Shiokombu’. Mine is somewhere between the two. It is a little more complex than a very basic Shiokombu, but it contains no animal products and thus could be used as part of a vegetarian meal.

The Ingredients

  • A 6 – 8 inch piece of Kombu, reconstituted;
  • 2 tbsp. Sugar;
  • 4 tbsp. Japanese Soy sauce;
  • 2 tbsp. Mirin;
  • 1 tbsp. Rice Vinegar;
  • ½ tsp. minced Ginger (optional);
  • 2/3 cup Water of Kombu Dashi;
  • Pinch of Sesame Seeds.

Kombu Tsukudani 2

Here is the reconstituted piece of Kombu I am using. You can simply soak a piece of dried seaweed in warm water for 10 or 15 minutes, or you can do as many people do and use a piece leftover from making the stock known as Dashi. If you are doing the former method, save some of the soaking water for the cooking fluid. You can use just plain water in either case but actual Dashi will provide the most flavor.

The Method

Kombu Tsukudani 3

First, slice the Kombu into thin shreds. This is easiest if you roll pieces of the frond and slice crosswise. You can make thicker shreds, if you like, or even cut the Kombu into smallish squares. You should have roughly a cup of shreds when you are done.

Kombu Tsukudani 4

Mix the sugar, soy, mirin, vinegar and ginger (if using) in a small saucepan and heat over a moderate flame until the sugar is dissolved and the liquid is just beginning to bubble.

Kombu Tsukudani 5

Now add the Kombu and the water (or dashi). Turn down the heat to a gentle simmer and cook, stirring occasionally, for about 20 minutes or so.

Kombu Tsukudani 6

When the liquid is just about all evaporated and what remains is syrupy, stir in the sesame seeds and remove from the heat to cool. The relish will keep for at least two weeks until ready for use (although this is likely only a concern if larger amounts are made for multiple uses).

Kombu Tsukudani 7

Tsukudani is sometimes used to stuff the Japanese rice balls known as Onigiri but it is especially good to add a little fillip to plain steamed rice as shown above. I haven’t tried it yet, but it may also make a nice relish alongside spicy skewers of meat…


4 Comments Post a comment
  1. cmgifford #

    John, do you like eel? I like it, and sometimes crave it. The oiliness I do not crave, but I do like it.

    April 2, 2014
    • I’ve only had it a few times but I have always enjoyed it.

      April 2, 2014
  2. Kaminoko #

    Thanks for posting this recipe. It’s delicious! I was looking for a use for the shredded kombu I had left over after making dashi, and this was just perfect.

    December 4, 2015
    • Glad you enjoyed it 🙂 I must make it again soon!

      December 4, 2015

Comments, thoughts or suggestions most welcome...

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Meet & Eats

The food that I've had the pleasure of meeting and eating.

Uncle Grumpy's Playroom

Current events, humor, science, religion, satire

Food Travel Lover

走过的地方 尝过的美食 留下的回忆

The Odd Pantry

Essays on food

Reputable Sources

Organizing ferments since 2013

that Other Cooking Blog

. food . photo . sous vide .


My Virtual Cookbook to Share My Love and Joy of Food and Cooking One Recipe at a Time

lola rugula

my journey of cooking, gardening, preserving and more

Yummy Lummy

I cook, photograph and eat food with the occasional restaurant review!

Eye Of the Beholder

A pair of eternally curious eyes and a camera...Life is beautiful.

gluten free zen

Taking The Stress Out Of Gluten-Free Grain-Free & Dairy-Free Living

Clayton's Kitchen

Big flavors and fun cooking from a cubbyhole kitchen

Bunny Eats Design

Happy things, tasty food and good design


Dentist chef, just a dentistry student who practice the dentist's cooking recipes in a dentist's kitchen

Mad Dog TV Dinners

Guess what's coming to dinner?


Real Food & Real Opinions

Bento Days

Making bentos for kids

Garden to Wok

Fresh and tasty!

Bam's Kitchen

Healthy World Cuisine

Trang Quynh

everyone is special in their own way :)

Farm to Table Asian Secrets

Full-Flavored Recipes for Every Season


If people say that life is too short to drink bad wine, it means also that life is too short to eat crappy food!

The Blog

The latest news on and the WordPress community.

The Unorthodox Epicure

Confessions of an Aspiring Food Snob

The 好吃 Challenge

1 girl, 273 days, 100 recipes


a recipe sharing and bento blog


Just another site

The Food Nazi

Never try to eat more than you can lift

Expat Chef in Barcelona

From my kitchen to yours

Keeping Up With the Holsbys

a journey into my head and my pantry

Nurul's Culinary Adventures

I Love Food, the Universe and Everything!!


home-cooking recipes, restaurant reviews, International cuisine ,

Naked Vegan Cooking

Body-positive Vegan Goodness

Bites of Food History

Sharing my Experimental Archaeology of Food

Stefan's Gourmet Blog

Cooking, food, wine


A Journey About Food, Recipes And Destinations


Fresh, exciting and adventurous food journey

One Man's Meat

Multi-award winning food blog, written in Dublin, Ireland.

%d bloggers like this: