Name: Sunomono Japanese Cucumber Salad
Prep time: 15 min
Total time: 15 min
Ingredients: 2 medium Japanese cucumbers (or Persian cucumbers), thinly sliced; 1 teaspoon salt; 3 tablespoons rice vinegar; 1 1/2 tablespoons sugar; 1 teaspoon soy sauce; 1 teaspoon toasted sesame seeds; 1 teaspoon sesame oil; 1 ounce wakame seaweed, dried, soaked and drained

Sunomono Japanese Cucumber Salad Recipe tastes crisp, tangy, a little sweet, and insanely refreshing, and it comes together in about 15 minutes from start to finish. It works perfectly for busy home cooks who want a light side dish that still feels special on a weeknight. I fell in love with this salad while working long shifts in restaurant kitchens and now keep cucumbers in my fridge almost like a personality trait.

Why Make This Sunomono Japanese Cucumber Salad Recipe at Home

You control the sweetness, saltiness, and acidity, so the salad fits your taste instead of the other way around. Restaurant versions often taste too sugary or too salty, while a homemade batch hits that clean, balanced flavor that makes cucumbers shine.

You also use simple pantry ingredients and very budget friendly cucumbers, so this side dish feels fancy without a fancy price tag. The salad chills quickly, so you can throw it together while your rice cooks and still sit down to a full meal at the same time.

“This Sunomono Japanese Cucumber Salad Recipe tastes like a chilled spa day in a bowl and disappears from the table in minutes. ★★★★★”

Ingredients You Need

Cucumbers

Japanese cucumbers or Persian cucumbers
- Thin skin and tiny seeds give the best crunch and texture.
- If you only find standard American cucumbers, peel them, slice lengthwise, scoop out the seeds, then cut into thin half moons.

Seasoning and dressing

Rice vinegar
- Use plain rice vinegar, not seasoned, so you control the sugar and salt.
- Brands like Marukan or Kikkoman taste mild and clean.
Sugar
- Regular granulated sugar works perfectly.
- You can use a touch of honey if you prefer, but it changes the flavor slightly and adds a floral note.
Soy sauce
- Adds umami and color.
- Use low sodium soy sauce if you watch salt levels.
Salt
- You need some for the dressing and some to draw water out of the cucumbers.
- Fine sea salt or kosher salt both work; avoid large flaky salt here.
Toasted sesame oil
- A tiny drizzle adds a nutty aroma that makes the salad taste restaurant quality.
- Use it sparingly so it does not overpower the vinegar.
Toasted sesame seeds
- White or black both work.
- Toast them lightly in a dry skillet until fragrant if they taste bland out of the jar.
Optional flavor boosters
- Wakame seaweed, dried: Soak briefly in water, then squeeze and add for a classic touch.
- Grated ginger: Adds a little warmth and freshness.
- Thinly sliced red onion or scallion: Adds color and a mild bite.
- A tiny pinch of red pepper flakes: Adds gentle heat without turning it into a spicy salad.

Pantry shortcuts

Use seasoned rice vinegar if that is what you have, then reduce or skip the sugar and taste as you go.
Use pre toasted sesame seeds to save time.
Buy pre sliced Persian cucumbers if your store sells them in the salad section, then just salt and dress.

Equipment list

Sharp chef’s knife or mandoline for thin, even slices
Cutting board
Medium mixing bowl for salting cucumbers
Small bowl or measuring cup for mixing the dressing
Colander or fine mesh strainer
Tongs or chopsticks for tossing
Measuring spoons and measuring cup

Tips & Mistakes

Slice cucumbers very thin so they soak up the dressing quickly and taste delicate, not chunky.
Salt the cucumbers and let them sit 10 minutes so they release water, or the salad turns watery and bland.
Squeeze the cucumbers gently after salting; press too hard and you crush them, press too soft and they stay soggy.
Taste the dressing before you add cucumbers and adjust sugar or vinegar so it hits that sweet tangy balance you like.
Chill the salad at least 10 minutes before serving so the flavors settle and the cucumbers stay crisp.
Add sesame oil at the end and use only a small drizzle, or it steals the spotlight from the clean vinegar flavor.
Do not oversalt at the start; cucumbers shrink and concentrate the salt, so always taste before adding more.
Skip strong flavored oils like olive oil, which fight with the light Japanese flavor profile.
Use fresh, firm cucumbers; soft or rubbery cucumbers never give that satisfying crunch.
Eat the salad within a day or two; longer storage makes the cucumbers limp and the flavor dull.

How to Make Sunomono Japanese Cucumber Salad Recipe

Step 1: Prep and slice the cucumbers

Wash the cucumbers and pat them dry. Trim off the ends. Slice them into very thin rounds, about 1/8 inch thick or thinner, using a sharp knife or mandoline.

If you use standard American cucumbers, peel them first, slice lengthwise, scrape out the seeds with a spoon, then cut into thin half moons. Place all sliced cucumbers in a medium mixing bowl.

Step 2: Salt and drain

Sprinkle the cucumbers with salt, about 1 teaspoon to start, and toss well so the salt coats every slice. Let the cucumbers sit at room temperature for about 10 minutes. You should see some liquid pooling at the bottom of the bowl.

Transfer the cucumbers to a colander or fine mesh strainer and let the liquid drain off. Gently squeeze the cucumbers with clean hands to press out extra water, but keep the slices intact. Place the drained cucumbers back into a clean bowl.

Step 3: Mix the dressing

In a small bowl or measuring cup, combine rice vinegar, sugar, a small splash of soy sauce, and a tiny drizzle of toasted sesame oil. Stir until the sugar dissolves completely. Taste and adjust: add a bit more sugar if you want more sweetness or a splash more vinegar if you want extra tang.

If you use seasoned rice vinegar, start with less sugar, taste, and only add more if you want it sweeter. Stir in optional grated ginger if you like a little warmth.

Step 4: Toss cucumbers with dressing

Pour the dressing over the drained cucumbers. Toss gently with tongs or chopsticks so every slice gets coated. Add toasted sesame seeds and any optional add ins like soaked wakame or thinly sliced scallion.

Taste a slice and adjust seasoning with a pinch of salt or a few drops of soy sauce if needed. The flavor should taste lightly sweet, bright, and refreshing, not heavy or overly salty.

Step 5: Chill and serve

Cover the bowl and chill the salad in the fridge for at least 10 to 15 minutes. This short rest lets the cucumbers soak up the dressing and keeps them crisp and cool. Give the salad a quick toss before serving and sprinkle a few extra sesame seeds on top for a pretty finish.

You can serve it straight from the fridge or let it sit at room temperature for 5 minutes so the flavors open up a bit. Enjoy it the same day for the best crunch.

Variations I've Tried

I often add a small handful of rehydrated wakame seaweed for a classic Japanese restaurant style sunomono. The seaweed adds a soft, silky texture that contrasts with the crunchy cucumbers. A few thin slices of radish also add color and a peppery bite.

Sometimes I swap a spoonful of sugar with mirin for a slightly richer sweetness. I also like a tiny pinch of red pepper flakes or a few slivers of fresh chili for a gentle kick. When I want extra protein, I top the salad with cooked shrimp or imitation crab sticks for a quick light lunch.

How to Serve Sunomono Japanese Cucumber Salad Recipe

Serve this Sunomono Japanese Cucumber Salad Recipe as a cool side dish next to grilled chicken, teriyaki salmon, or a simple bowl of steamed rice and miso soup. It also works nicely as a starter before sushi or rice bowls, since it wakes up your palate without feeling heavy. Pack it into lunch boxes in a small container to add something fresh and crunchy to leftovers. Pair it with iced green tea, cold barley tea, or sparkling water with lemon for a refreshing meal.

How to store

Fridge: Store leftovers in an airtight container in the refrigerator for up to 2 days; the cucumbers stay crisp on day one and soften slightly on day two.
Freezer: Skip freezing; cucumbers lose their texture and turn mushy after thawing.
Best serving window: Enjoy the salad within a few hours of making it for peak crunch and brightness.
Rechilling and serving: Stir the salad before serving again, taste, and add a splash of rice vinegar or a pinch of salt if the flavor faded a bit in the fridge.