Japanese Cucumber Salad (Sunomono)

This Japanese cucumber salad, also called cucumber sunomono, is a light Japanese vinegar side dish made with crisp English cucumber, rice vinegar, soy sauce, sugar, and toasted sesame seeds. Salting the cucumber first keeps every slice firm and prevents the sweet-tangy dressing from becoming watery. 

Whenever I make a Japanese-style dinner at home, this cucumber salad is usually the first thing I prepare. I slice and salt the cucumber before I start the rest of the meal, then let it sit while I cook something warmer and richer, such as Chicken Katsu Curry, Teriyaki Chicken, or Salmon Sushi Bake. By the time dinner is ready, the salad has chilled properly and brings that cold, sharp contrast that makes the whole plate feel more complete. It is one of those small side dishes that does not ask for much effort but makes a simple dinner feel better planned. 

I wanted this cucumber sunomono to stay simple and let the dressing do its job without covering up the cucumber. Rice vinegar gives it a clean tang, sugar softens the acidity, and a small amount of soy sauce adds savoury depth without making it heavy. Thin slicing, salting, and gently squeezing the cucumber are the steps that make the texture work: each slice stays crisp while still absorbing the dressing. Unlike my High Protein Cucumber Chicken Salad, which is made to be a more filling lunch, this one is meant to be light, refreshing, and served in small portions beside a richer main dish. 

Key Ingredients for Japanese Cucumber Salad

You only need a handful of ingredients, but each one plays an important part in giving this Sunomono its clean flavour and crisp texture.

• English Cucumber: I use an English cucumber because the skin is tender, the seeds are small, and it stays crisp after salting. It also gives you neat, thin slices without needing to peel it first. 
• Salt: A small amount of salt makes a big difference here. I use it to draw out excess moisture from the cucumber so the dressing stays bright instead of becoming watery. 
• Rice Vinegar: Rice vinegar is what gives this salad its clean, lightly sweet tang. I prefer it over stronger vinegars because it keeps the flavour gentle and lets the cucumber stay the main focus. 
• Sugar, Soy Sauce, and Toasted Sesame Seeds: I keep these three together because they finish the dressing. The sugar balances the vinegar, the soy sauce adds a small savoury note, and toasted sesame seeds give every bite a subtle nutty flavour. 

How to Make Japanese Cucumber Salad

This recipe comes together in four simple steps. Start it before you cook the rest of dinner so the cucumber has enough time to salt and chill. You can find the complete recipe with measurements in the recipe card below.

Helpful Swaps

• Persian or Japanese Cucumbers: Use 3 to 4 Persian cucumbers in place of 1 English cucumber. Japanese cucumbers also work well when available. 
• Tamari: Use tamari instead of soy sauce for a gluten-free version. 
• Black Sesame Seeds: Use black sesame seeds instead of white sesame seeds for a slightly different look while keeping the same nutty finish. 

Storage

I keep leftover Japanese cucumber salad covered in the refrigerator for up to 2 days, but it is at its crispest on the day it is made. The cucumber will release more liquid as it sits, so give it a quick stir before serving leftovers. 

What to Serve With Japanese Cucumber Salad

This cucumber Sunomono works especially well with richer Japanese-style meals. Serve it beside Chicken Katsu Curry to cut through the crispy chicken and curry sauce, or add it to a sharing table with Salmon Sushi Bake for a fresh contrast to the creamy salmon and rice. 

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