Sunomono is a Japanese vinegared salad built from two pantry-friendly ingredients: cucumber and dried wakame seaweed. It comes together in 15 minutes with no cooking, and the dressing is four ingredients you likely already have. Itโs the kind of side dish that makes a heavy main feel lighter without any extra effort.
Why this recipe works
Two techniques carry this salad. First, salting the cucumber before dressing pulls out excess water, which means the dressing stays concentrated and actually coats each slice instead of pooling at the bottom of the bowl. Skip this step and you get a watery, diluted result. Second, dissolving the sugar fully into the rice vinegar before adding soy sauce matters more than it sounds โ undissolved sugar settles out and the dressing tastes uneven, sharp in one bite and flat in the next. Whisk until the liquid is completely clear, then taste it. It should be bright and a little sweet, not mouth-puckering. Those two steps are what separate a salad that tastes intentional from one that just tastes like vinegar and vegetables.
Common problems and fixes
- Wakame stays rubbery after soaking: It needs a full 10 minutes in cold water โ not warm, which can make it slimy. If your wakame is still tough, give it another 3โ4 minutes. Pieces should be tender and silky, not chewy.
- Dressing tastes too sharp: Rice vinegar brands vary in acidity. If yours is particularly tart, add a small pinch more sugar and taste again. A tiny drop of sesame oil also softens the edge without changing the flavor profile.
- Salad goes watery by the time it reaches the table: Dress it at the table โ a pre-dressed salad goes limp fast. Toss everything together right before serving, not during the chill time.
- Canโt find Japanese or Persian cucumbers: A standard English cucumber works fine. Peel it, halve it lengthwise, and scrape out the seeds with a spoon before slicing. This removes the extra moisture that would otherwise water down the dressing.
- Wakame is hard to find locally: Dried wakame is sold at most Asian grocery stores and online, but if youโre stuck, thinly sliced nori (the sheets used for sushi) cut into thin strips gives a similar oceanic flavor. The texture is different โ crispier rather than silky โ but the salad still works.
Japanese Cucumber and Wakame Salad
Equipment
- Mandoline slicer or sharp chefโs knife
- Small mixing bowl
- Large mixing bowl
- Measuring spoons
- Fine mesh strainer
Ingredients
For the Salad Base:
- 2 each Japanese cucumbers very thinly sliced; Persian cucumbers may be substituted
- 0.25 cup dried wakame seaweed use high-quality Japanese wakame for proper texture
For the Dressing:
- 3 tablespoons rice vinegar unseasoned preferred
- 1 tablespoon granulated sugar to taste
- 0.5 teaspoon soy sauce light soy sauce for gentle umami
- 0.25 teaspoon sea salt for salting cucumbers
Optional Garnish:
- 1 teaspoon toasted sesame seeds lightly crushed for aroma
Instructions
- Soak the wakame in a bowl of cold water for 10 minutes until fully rehydrated and expanded. Drain in a fine mesh strainer and gently squeeze out excess water. Set aside.
- Thinly slice the Japanese cucumbers using a mandoline or sharp knife. Sprinkle with 1/4 teaspoon sea salt and let sit for 5 minutes to draw out moisture. Then, lightly squeeze the cucumbers to remove excess liquid.
- In a small mixing bowl, whisk together the rice vinegar, sugar, and soy sauce until the sugar is dissolved.
- In a large mixing bowl, combine the drained wakame and squeezed cucumbers. Pour the dressing over and toss gently to coat evenly. Chill in the refrigerator for 5 minutes before serving.
- When ready to serve, gently toss again and transfer to individual bowls. Garnish with toasted sesame seeds if desired.
Notes
- Use seedless cucumbers to avoid excess moisture and bitterness. Japanese or Persian varieties work best.
- For a spicier kick, add a touch of grated ginger or a dash of chili oil.
- Substitute rice vinegar with apple cider vinegar if necessary, but use less sugar to balance acidity.
- This salad can be made up to 2 hours ahead. Just wait to garnish with sesame until serving.
Nutrition
Your questions, answered
Can I use regular white vinegar instead of rice vinegar?
You can, but cut the amount by about a third โ white vinegar is sharper and will overpower the cucumber. Add a little extra sugar to compensate, and taste as you go.
How far ahead can I make this?
Prep the components up to a few hours ahead, but keep the cucumber, wakame, and dressing separate until just before serving. Once dressed, the cucumber releases more liquid and the salad softens quickly.
Can I use soy sauce alternatives like tamari or coconut aminos?
Yes. Tamari is a direct swap and keeps the salad gluten-free. Coconut aminos are slightly sweeter, so reduce the sugar by a small pinch to keep the dressing balanced.
What can I serve this alongside?
It works best next to something rich or salty โ grilled fish, pan-fried tofu, or a bowl of miso soup. The acidity cuts through heavier flavors and resets the palate between bites.
Is there a substitute for dried wakame if I want to skip ordering online?
Thinly sliced nori strips are the most accessible swap and available at many regular supermarkets. For a land-based alternative, thinly sliced blanched spinach gives a similar tender texture, though without the oceanic flavor.