What Is Sunomono? Japanese Vinegared Side Dishes Explained
Oct 04, 2026
Sunomono (酢の物) are Japanese dishes seasoned with vinegar, usually served in a small portion as a side dish. Cucumber, seaweed and seafood are common ingredients, but sunomono is a broad category rather than one fixed recipe.
The word is simple: su means vinegar and mono means “thing.” In practice, the vinegar is usually part of a light dressing that can also contain soy sauce, sugar, dashi, citrus or other seasonings.
What does sunomono mean?
Sunomono literally means “vinegared thing” or “vinegar-seasoned dish.” The term covers foods dressed with vinegar rather than one specific combination of ingredients.
Japan’s Ministry of Agriculture, Forestry and Fisheries documents many regional sunomono, from squid with cucumber and wakame to vegetables dressed with vinegar, soy sauce and sugar. That variety is a good reminder that the category is defined more by seasoning than by one recipe.
Is sunomono a salad?
It can resemble a small salad, but “salad” is only an approximate translation. Sunomono are often cool or room-temperature side dishes with a vinegar-based dressing.
Some use raw cucumber or seaweed. Others use cooked seafood or vegetables. The portion is often small, and the dish may be served as one component among several rather than as a large salad course.
What ingredients are common in sunomono?
Cucumber and wakame are among the most familiar ingredients, but many vegetables and seafood can be used.
- cucumber;
- wakame and other seaweeds;
- octopus, squid, shellfish or eel;
- daikon and other vegetables;
- ginger, sesame or citrus as accents.
The exact combination depends on region, season and household.
What is the vinegar dressing made from?
There is no single universal sunomono dressing. Rice vinegar is common, often balanced with soy sauce, sugar, mirin, dashi or citrus.
The Japanese term awase-zu means blended or seasoned vinegar. It refers to vinegar mixed with other seasonings for a particular use.
What are nihaizu and sanbaizu?
Nihaizu and sanbaizu are names for seasoned vinegar mixtures. Traditional explanations often describe nihaizu as a two-part vinegar seasoning and sanbaizu as a three-part or sweeter seasoned vinegar.
Recipes are not completely fixed. MAFF gives examples where nihaizu combines vinegar and soy sauce, while sweeter dressings may add sugar or other seasonings. Household and regional versions differ, so it is better to understand the names as families of seasoned vinegar rather than one compulsory formula.
Is sunomono the same as tsukemono?
No. Sunomono are vinegar-seasoned dishes; tsukemono are pickles. Sunomono are usually dressed for eating as a side dish, while tsukemono belong to the much broader world of Japanese pickling and preservation.
The techniques can overlap at the edges, especially when vegetables spend some time in salt or vinegar. But at the table, cucumber sunomono and cucumber pickles are normally understood as different kinds of dish.
Is sunomono the same as namasu?
They overlap, but the words are not perfect synonyms. Namasu commonly refers to ingredients cut into thin pieces and dressed in vinegar, often vegetables or seafood. It can be understood as a particular family within the wider world of vinegared dishes.
For example, kōhaku namasu made from daikon and carrot is strongly associated with New Year food. Other namasu are regional or everyday dishes.
What is sujime?
Sujime is a vinegar-curing technique, often used for fish, rather than the general name for a small vinegared side dish. The fish is salted and then treated with vinegar to change its flavour and texture.
A sujime preparation could be served within a larger dish, but the word describes the treatment of the ingredient rather than the same category as sunomono.
Where does sunomono fit in a Japanese meal?
Sunomono often appears as a small side dish that adds acidity and a different texture beside richer, grilled or simmered foods. It can be part of an everyday meal, a restaurant meal or a more formal sequence.
There is no rule that every Japanese meal needs one. It is simply one useful way of preparing a small dish.
Is sunomono served before or after the main dish?
There is no single position for all meals. In everyday dining, a sunomono side dish may arrive with the rest of the meal. In multi-course restaurant settings, a vinegared dish may appear at a particular point in the sequence.
The serving order depends on the style of meal rather than on the word sunomono alone.
What bowl is used for sunomono?
A small bowl such as a kobachi is a natural choice because it contains dressing and loose ingredients well. A small plate or glass vessel can also work when the food and portion suit it.
Our guide to Kobachi, Kozara & Mamezara explains the small-vessel vocabulary in more detail.
Can sunomono appear as mukōzuke?
A vinegared preparation can appear in the mukōzuke position of tea-kaiseki, but sunomono and mukōzuke are not synonyms. Sunomono describes the vinegar-seasoned food; mukōzuke describes a role and position in that meal, and also the vessel used for it.
See What Is Mukōzuke? for that distinction.
Is sunomono always cold?
Many familiar sunomono are served cool or at room temperature, but temperature is not the core definition. The essential feature is vinegar seasoning.
Ingredients may be cooked first and then cooled or dressed. Seafood, for example, can be boiled or otherwise prepared before vinegar is added.
Does sunomono change with the season?
Yes, mainly through the ingredients. Cucumber and refreshing vinegared dishes are especially appealing in warm weather, while regional recipes use whatever vegetables and seafood are available locally.
Season does not require decorative symbolism. Often the ingredient itself is enough. See seasonality at the Japanese table for the broader idea.
Can you make sunomono without seafood?
Yes. Vegetable-only sunomono are common. Cucumber, wakame, daikon and other vegetables can be dressed without fish or shellfish.
The category is defined by the vinegar seasoning, not by the presence of seafood.
Sunomono in one sentence
Sunomono are Japanese vinegar-seasoned dishes, usually served in a small portion and made with vegetables, seaweed, seafood or a combination of them.
Where to go next
Continue with Kobachi, Kozara & Mamezara, Mukōzuke, Seasonality at the Japanese Table, or the main Japanese Table guide.
For more close-up explanations of Japanese food and everyday objects, visit Japan in Detail.
