Thin cucumber slices soaking in sweet-sour rice vinegar with a tangle of dark seaweed. That's what happens when you salt cucumbers first to draw out water, then marinate them in a tangy dressing.
The salting step does most of the work. You get crisp texture without sogginess or bland flavor.
This works for weeknight dinners when you need a side that feels intentional but takes 15 minutes. Also perfect for meal prep since it holds in the fridge for days.
Salt cucumber slices for 15 minutes to draw moisture, then rinse and marinate in rice vinegar, sugar, and soy sauce. The salting step prevents sogginess while the vinegar balances sweetness and acidity. Marinate at least 10 minutes for flavor to develop.
Why This Recipe Works
Rice vinegar mixed with sugar creates a balanced sweet-sour base that coats cucumbers without overwhelming them. Most people skip salmon, but it balances the meal. For a version that comes together quickly, simple homemade salmon hits the table while the cucumbers marinate.
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Prep Time
15 min
Cook Time
0 min
Total Time
15 min (plus optional marinating up to 2 hours)
Servings
4 servings
Difficulty
Easy
Category
Side | Appetizer
Quick Tip
Salt cucumbers then rinse for crispness
Best For
Weeknight | Meal prep | Entertaining
What makes this work:
- Salting draws moisture - cucumbers release water before marinating, staying crisp instead of turning mushy
- Balanced sweet-sour ratio - rice vinegar and sugar create tangy brightness without overwhelming saltiness
- Thin slices absorb flavor - ⅛-inch slices soak up dressing faster than thick chunks
- Wakame adds umami - seaweed soaked 5-7 minutes brings savory depth without fishiness
- Minimal marinating time - 10-15 minutes is enough for flavor to penetrate without softening texture
What You'll Need
Japanese cucumbers have thin skin and fewer seeds than standard varieties, which means less bitterness and better crunch. A good salad can make or break the plate. For a version that comes together quickly, this related salad recipe uses similar bright flavors with different textures.
- 2 Japanese cucumbers (or 1 English cucumber)
- 3 tablespoon rice vinegar
- 1 tablespoon sugar
- 1 teaspoon soy sauce
- ½ teaspoon salt (for salting cucumbers)
- 2 tablespoon dried wakame seaweed
- 1 teaspoon sesame seeds
- 1 teaspoon mirin (optional)
- ½ teaspoon grated ginger (optional)
Ingredient Details
- Japanese cucumber
Thin skin, fewer seeds, crisper texture - slice ⅛ inch thick with sharp knife or mandoline - Rice vinegar
Milder acidity than white vinegar - warm with sugar to dissolve fully before mixing - Sugar
White granulated works best - balances vinegar without altering color - Wakame seaweed
Soak dried seaweed 5-7 minutes in cold water, drain well before adding to salad - Soy sauce
Adds savory depth - use tamari for gluten-free version - Sesame seeds
Toast 1 teaspoon over medium heat for 2 minutes for nutty aroma - Mirin
Optional sweetener - adds mild alcohol aroma and extra sweetness to dressing
Ingredient Swaps
English cucumbers have more water than Japanese varieties but work fine if you salt them longer. Rich mains need something to cut through, and salad does exactly that. We keep a batch ready for nights like this - a fresh salad side uses similar vinegar-based dressing with different vegetables.
Four swaps that work:
- Japanese cucumber → English cucumber - slice thin, salt 15-20 minutes instead of 15, rinse well to remove excess water
- Rice vinegar → white vinegar with pinch of sugar - sharper acidity, less nuanced flavor, use 2 tablespoons white vinegar plus ¼ teaspoon extra sugar
- Soy sauce → tamari - gluten-free with similar savory flavor, use same amount
- Sugar → honey or maple syrup - different sweetness profile, use 2 teaspoons honey or maple syrup instead of 1 tablespoon sugar
Japanese Cucumber
Works for: Traditional texture, less water, thinner skin, crisper bite after salting
Skip if: Unavailable in local stores, budget tight, English cucumber already on hand
English Cucumber
Works for: Budget-friendly, widely available, works with longer salting time
Skip if: Want traditional crisp texture, less watery result, authentic Japanese flavor
Instructions
Total time from start to serving is 25-30 minutes including marinating, but active prep only takes 15 minutes. The chicken works best when it hits the table at the same time as the main. For a version that comes together quickly, simple chicken recipe pairs well with this tangy side.
Slice and salt cucumbers - Cut cucumbers into ⅛-inch thin slices using sharp knife or mandoline. Sprinkle ½ teaspoon salt over slices in mixing bowl, toss to coat, let sit exactly 15 minutes to draw moisture.
Prepare dressing - Warm 2 tablespoons rice vinegar with 1 tablespoon sugar in small saucepan over low heat for 1-2 minutes until sugar dissolves fully. Remove from heat, stir in 1 teaspoon soy sauce and 1 tablespoon rice vinegar. Let cool while cucumbers salt.
Soak seaweed - Place 2 tablespoons dried wakame seaweed in bowl, cover with cold water, soak 5-7 minutes until soft. Drain well, squeeze out excess water with hands, chop into bite-sized pieces if needed.
Rinse and drain cucumbers - After 15 minutes, rinse salted cucumber slices under cold water for 30 seconds to remove excess salt. Drain in colander or strainer for 5 minutes, pressing gently to remove water without crushing slices.
Combine and marinate - Add drained cucumbers and seaweed to large bowl, pour dressing over, toss to coat evenly. Marinate at least 10 minutes at room temperature or refrigerate up to 2 hours. Sprinkle 1 teaspoon toasted sesame seeds before serving.
What to Serve With It
Sunomono works best alongside rich or fried Japanese dishes that need acidity to cut through heaviness. Most people skip pork, but it balances the meal. For a version that comes together quickly, a tender pork side benefits from the tangy crunch of this salad.
| Side Dish | Prep | Why It Works | How to Serve |
|---|---|---|---|
| Grilled teriyaki chicken | Easy | Adds protein, balances freshness of salad with savory glaze | Serve salad in small bowl next to chicken, pour extra dressing over rice |
| Steamed white rice | Easy | Neutral base complements acidity without competing flavors | Place salad on top of rice or serve in separate small dish |
| Miso soup | Easy | Warm umami contrasts cold salad, traditional Japanese pairing | Serve soup first, salad alongside main dish |
| Edamame beans | Easy | Simple snack, adds texture and protein without heaviness | Serve edamame and salad as shared appetizers before main |
| Assorted sushi platter | Medium | Traditional pairing, light and elegant for entertaining | Arrange salad in small bowls next to sushi plates |
Three ways to serve it:
- As appetizer - divide into small bowls, garnish with extra sesame seeds, serve before main course
- With rice bowls - spoon salad over steamed rice, add grilled protein, drizzle ponzu sauce
- Meal prep - portion into containers with teriyaki chicken or salmon, pack rice separately, combine before eating
Need more pairing ideas for chicken dishes? For easy chicken wings dinner nights, this salad adds refreshing crunch that cuts through rich, sticky sauces.
Store and Reheat
Sunomono holds in the fridge for 3-4 days but cucumbers soften slightly after the first day. Rich mains need something to cut through, and salad does exactly that. We keep a batch ready for nights like this - easy soup side pairs well when you want warm and cold contrast on the plate.
| Method | Time | Best For |
|---|---|---|
| 🍳 Stovetop | N/A | Not applicable - serve cold to maintain texture and flavor |
| 📦 Microwave | N/A | Not applicable - heating destroys crisp texture and bright acidity |
| 🔥 Oven | N/A | Not applicable - cucumbers wilt and seaweed turns slimy when heated |
For best results when storing:
- Use airtight container - prevents cucumbers from absorbing fridge odors and dressing from evaporating
- Store in shallow dish - cucumbers stay submerged in dressing without excess liquid pooling at bottom
- Drain before serving - pour off excess liquid that accumulates after first day for better texture
- Add fresh cucumbers - mix in newly salted and rinsed cucumbers to refresh texture after 2-3 days
- Keep seaweed separate - if meal prepping, store wakame separately and add just before eating to prevent sliminess
Frequently Asked Questions
Yes, English cucumbers work but have more water and thicker skin. Salt slices for 15-20 minutes instead of 15, rinse well, and drain thoroughly to remove excess moisture.
3-4 days in an airtight container. Cucumbers soften slightly after the first day but stay crisp enough to eat. Drain excess liquid before serving.
After exactly 15 minutes, cucumbers release visible water in the bowl and feel slightly flexible but still crisp. Rinse under cold water for 30 seconds, then drain 5 minutes before marinating.
Skipping the salting step or marinating too long causes sogginess. Always salt cucumbers 15 minutes, rinse well, drain thoroughly, and marinate maximum 2 hours for best texture.
Yes, multiply or divide all ingredients by the same amount. Keep salting time at 15 minutes regardless of batch size, and maintain ⅛-inch slice thickness for consistent texture.
Japanese Sunomono Cucumber Salad
Ingredients
Equipment
Method
- Cut cucumbers into ⅛-inch thin slices using a sharp knife or mandoline. Sprinkle ½ teaspoon salt over slices in a mixing bowl, toss to coat, and let sit exactly 15 minutes to draw out moisture.2 whole Japanese cucumber, 0.5 tsp salt
- Warm 2 tablespoons rice vinegar and 1 tablespoon sugar in a small saucepan over low heat for 1-2 minutes until sugar dissolves fully. Remove from heat, stir in 1 teaspoon soy sauce and 1 tablespoon additional rice vinegar. Let cool while cucumbers salt.3 tbsp rice vinegar, 1 tbsp sugar, 1 tsp soy sauce
- Place 2 tablespoons dried wakame seaweed in a bowl, cover with cold water, and soak for 5-7 minutes until soft. Drain well and squeeze out excess water. Chop into bite-sized pieces if desired.2 tbsp dried wakame seaweed
- After 15 minutes, rinse salted cucumber slices under cold water for 30 seconds to remove excess salt. Drain in a colander for 5 minutes, pressing gently to remove water without crushing slices.2 whole Japanese cucumber, 0.5 tsp salt
- Add drained cucumbers and seaweed to a large bowl. Pour dressing over and toss to coat evenly. Marinate at least 10 minutes at room temperature or refrigerate up to 2 hours. Sprinkle 1 teaspoon toasted sesame seeds before serving. Optionally stir in mirin and grated ginger.2 whole Japanese cucumber, 2 tbsp dried wakame seaweed, 3 tbsp rice vinegar, 1 tsp soy sauce, 1 tsp sesame seeds, 1 tsp mirin, 0.5 tsp grated ginger
Notes
- Never skip the salting and rinsing steps to prevent watery, bland cucumbers.
- Warm rice vinegar with sugar to fully dissolve sugar and avoid cloudy dressing.
- Marinate no longer than 2 hours to maintain cucumber crispness.
