Stone mozuku seaweed and sea lettuce tsukudani

Catch the Ocean’s Flavor in Every Bite – A Savory Seaweed Delight

Enjoy the satisfying crunch of Stone Mozuku and the fresh aroma of Sea Lettuce, simmered to perfection in a soy-based sauce. Infused with bonito and sardine extracts, this Japanese-style seaweed condiment (tsukudani) offers a rich umami taste and a clean, savory finish.
Naturally high in calcium, folic acid, and essential minerals, it's a smart and flavorful way to enhance your daily meals. Spoon it over rice, tuck it into rice balls, or serve as a topping for tofu, eggs, or noodles.

What Is Stone Mozuku (Iwa Mozuku)?

Stone mozuku, also known as iwa mozuku, is a wild seaweed that naturally grows on underwater rocks along the Sea of Japan coast. Sometimes called “silk mozuku,” it features finer strands than common mozuku, offering a crisp texture and clean, briny aroma. Its delicate mouthfeel and high mineral content make it a prized ingredient in traditional Japanese cuisine.

What Is Sea Lettuce (Aosa)?

Sea lettuce, known as aosa in Japanese, is a soft green seaweed with a mild, fresh flavor. Often used in soups, rice dishes, and salads, it adds color, aroma, and nutrients such as fiber, calcium, and folic acid. Also referred to as “green laver,” it brings a light ocean taste to everyday meals.

What Is Tsukudani?

Tsukudani is a traditional Japanese preparation made by simmering seaweed or small seafood in soy sauce and sugar. The result is a sweet and savory dish packed with umami flavor. Commonly served as a topping for rice, tofu, or vegetables, it adds depth and richness to simple meals.

“No Chemical Seasonings or Preservatives Added”

This product brings out the natural umami of its ingredients through scientific analysis and the refined skills of seasoned experts—without relying on any chemical seasonings or preservatives.

Using ON THE UMAMI’s proprietary technology, the natural variation found in ingredients is refined into a stable, consistent taste—so you can enjoy the same delicious flavor every day without getting tired of it.

Net weight: 70g (2.47 oz)

Shelf life: 6 months when stored in a cool place.

How to store: Store in a cool, dry place, away from light.

Ingredients: Iwamozuku (dried seaweed), Soy sauce (wheat, soybeans, salt), Sugar, Aosa  (dried seaweed), High fructose corn syrup, Nori (dried seaweed laver), Dried bonito, Salt, Fermented Seasoning, Starch syrup, Dried bonito extract, Hydrolyzed fish protein, Dried sardines extract, Sake (rice, malted rice, ethylalcohol), Yeast extract, Ethyl alcohol.

Contains: Fish (bonito, sardines), Wheat, Soybeans.

Made in Japan: Carefully crafted in Japan using premium domestic ingredients.

Nutritional Information