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    Home » Side dishes

    Sunomono - Japanese cucumber salad

    Modified: Jul 7, 2025 · Published: Aug 8, 2024 by Caroline

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    Sunomono, Japanese cucumber salad, is so easy to prepare and wonderfully refreshing. Great as a side to a whole range of dishes or enjoy as an appetizer.

    Japanese cucumber salad, sunomono, is a super simple salad combining thinly sliced cucumber slices with a sweetened vinegar dressing and a little seaweed. It's really easy to prepare and a classic side dish for many a meal.

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    side view of plate of Japanese cucumber salad, sunomono.

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    I have had this salad many times over the years, but it was a huge favorite when we were recently in Kyoto. The weather was so incredibly hot and humid while we were there that we needed light, simple foods particularly during the middle of the daytime heat. This fits the bill perfectly. 

    This cucumber salad is refreshing, easy to make and perfect with lunch, dinner or whenever you choose. And with no cooking needed and just a few ingredients, it's easy to make at home.

    overhead view of dishes with Japanese cucumber salad, sunomono.

    What does sunomono mean?

    "Su" means "vinegar" and "sunomono" literally translates as "vinegared things". Technically, it's a style of Japanese salad that uses vinegar as the main seasoning. In practice, most people understand it to mean this Japanese cucumber salad. 

    The main ingredients are cucumber and the seasoned vinegar dressing. Beyond that, you can have a few different additions. Most versions also include wakame seaweed, though not all. Some also include seafood like shrimp, crab or octopus, or add some thin, cold rice noodles.

    Personally, I like to keep it relatively simple, though with a little wakame for texture and color. But feel free to add to it as suits.

    small cucumbers, bottle of rice vinegar, dishes with dried wakame and sugar and salt.

    What kind of cucumber should you use?

    Traditionally, this is made with Japanese cucumbers that are smaller than English cucmbers, fairly thin and with a thin skin. However if you can't find them, you could also use Lebanese or Persian cucumbers that are a bit smaller but otherwise relatively similar. If you use those, you probably need around 1 ½ times as many cucumbers for the same overall quantity.

    Mini cucumbers also work, as I have here - you probably need about double the quantity of those relative to Japanese cucumbers.

    If you can't find any of those, you could use English cucumbers though they are not ideal. They tend to have a higher water content and thicker skin, so you'll want to peel them first, at least partly, then either halve and remove some of the seeds or squeeze out a bit after salting so that they are less watery. 

    The smaller, thicker cucumbers that are often called pickling cucumbers are probably the least good as they have thick skins, big seeds and also larger slices, so I would try to avoid those.

    slices of cucumber on chopping board with part cucumber to one side, slice to other.

    Dressing variations

    The main ingredient in the dressing for this salad is rice vinegar, which you sweeten slightly to take the edge off the acidity and make it more balanced. But how you do that can vary.

    Many use simply sugar - use plain white sugar so you don't add any additional flavor that may distract. You can add a dash salt though I feel there's enough from salting the cucumber.

    Alternative versions swap in all or part mirin which is a slightly sweetened wine-based seasoning for the sugar. Some add some soy sauce for a little flavor, but only a little as you don't want it to take over. If possible use light soy, usukuchi. Though these both seem less traditional, so I've kept it simple here.

    squeezing liquid from rehydrated wakame seaweed

    How to make Japanese cucumber salad

    This comes together in a few easy steps:

    • Rehydrate the wakame by pouring hot water over it and leaving it to soak.
    • Meanwhile, trim the ends from the cucmber and thinly slice. To make evenly thin slices, a mandolin or wide peeler works best, though take care using these.
    • Salt the cucmber slices and leave them a few minutes so that liquid droplets form. This salting helps draw out liquid to stop the salad being watery, as well as drawing out bitterness.
    • Mix the vinegar and sugar in a small bowl. Warm slightly in the microwave to then and stir so the sugar dissolves.
    • Squeeze the wakame to drain and gently squeeze the cucumber to drain the liquid without breaking the slices.
    • Place cucumber, wakame and dressing together in a bowl then toss to combine. Optionally, top the salad with toasted sesame seeds and serve.

    Sunomono salad is super simple, light and refreshing. It pairs well with simple, lighter dishes like onigiri and/or kani salad for a light summery meal, or alongside a broader range of dishes like miso soup, sashimi, chirashi sushi or chicken karaage and rice for a fuller meal. Delicious no matter when you enjoy. 

    plate of Japanese cucumber salad, sunomono with end of chopsticks on cloth behind.

    Try these other simple vegetable sides:

    • Pressgurka, Swedish pressed cucumber salad (another simple and tasty way to prepare cucumber)
    • Urap sayur (Indonesian vegetables with coconut topping)
    • Vichy carrots (rich with butter and so easy to make)
    • Miso glazed eggplant (easy, tasty and would pair well with this, too)
    • Plus get more side dish recipes and Japanese recipes in the archives.
    small plate of Japanese cucumber salad, sunomono.
    Print Recipe
    5 from 1 vote

    Sunomono, Japanese cucumber salad

    This simple cucumber salad is easy to make, refreshing and versatile.
    Prep Time10 minutes mins
    Cook Time1 minute min
    Total Time11 minutes mins
    Course: Appetizer/Starter, Side Dish
    Cuisine: Japanese
    Servings: 2 approx
    Calories: 26kcal
    Author: Caroline
    SaveSaved!

    Ingredients

    • 1 tablespoon wakame (dried seaweed
    • 5 oz cucumber see notes
    • ¼ teaspoon salt
    • 1 tablespoon rice vinegar
    • ½ tablespoon sugar (white)
    • ½ teaspoon toasted sesame seeds optional

    Instructions

    • Place the wakame in a small heatproof bowl and add boiling water to cover it well. Set aside for around 5 minutes to rehydrate while you prepare everything else.
    • Trim the ends off the cucumber then thinly slice - using a mandolin or wide vegetable slicer/peeler will help get even, thin slices but you can also cut by hand. Place the slices in a bowl, sprinkle over the salt and toss gently to spread the salt more evenly (alternatively, place some of the slices in the bowl, sprinkle part of the salt, add more cucumber then more salt). Leave for around 3 minutes to let the salt draw out some of the liquid.
    • Meanwhile, place the vinegar and sugar in a small non-reactive microwavable bowl. Warm in the microwave for around 10-15 seconds so that the vinegar is warm and starting to steam gently. Stir so that the sugar dissolves.
    • Squeeze the wakame with your hand to drain off as much liquid as you can, without breaking the pieces too much then set aside. Drain the liquid from the cucumber - I generally press it against the side of the bowl with my hand then drain off the liquid, or else you can squeeze handfuls. Just take care not to break up the slices.
    • Place the drained cucumber, wakame and vinegar dressing in a bowl (either the bowl from the dressing, if large enough, or all in the bowl from the cucumber after draining works too). Mix together so everything is well mixed, but without breaking, and serve. If you like, add toasted sesame seeds on top as you serve.

    Video

    Notes

    5oz/140g is approx 1 Japanese cucumber, 1 ½ Lebanese/Persian cucumbers or 2 mini cucumbers. If you use an English cucumber, you will probably want to remove some or all of the skin and some of the seeds.

    Nutrition

    Calories: 26kcal | Carbohydrates: 5g | Protein: 1g | Fat: 0.4g | Saturated Fat: 0.1g | Polyunsaturated Fat: 0.1g | Monounsaturated Fat: 0.1g | Sodium: 319mg | Potassium: 100mg | Fiber: 1g | Sugar: 4g | Vitamin A: 60IU | Vitamin C: 2mg | Calcium: 19mg | Iron: 0.3mg
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    Sunomono, Japanese cucumber salad, is so easy to prepare and wonderfully refreshing. Great as a side to a whole range of dishes or enjoy as an appetizer.
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    1. Gianne says

      August 13, 2024 at 7:47 pm

      5 stars
      The cucumbers were perfectly crisp and the dressing had the ideal balance of sweet, tangy, and savory flavors. It's so simple and we enjoyed it a lot.

      Reply
      • Caroline's Cooking says

        August 14, 2024 at 9:23 pm

        Glad to hear you enjoyed! I agree the flavors are such a great mix.

        Reply
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