Japanese Sunomono Vinegared Salad and the Sanbaizu Three-Vinegar Dressing Tradition

Ingredients

• For the shio-momi vegetables
• 2 medium Japanese cucumber (kyuri), sliced into thin rounds
• 1 tsp fine salt, for shio-momi pre-treatment
• 20 g dried wakame, rehydrated in cold water 5–10 minutes, drained
• For the sanbaizu dressing
• 45 ml rice vinegar (junmai su, 純米酢), high-quality; Yokoi Vinegar or Uchibori preferred
• 45 ml soy sauce
• 45 ml mirin
• To finish
• 1 tsp sesame seeds, lightly toasted
• 1 tsp freshly grated ginger or yuzu rind, or lemon zest; one garnish chosen

Method

1. 1
   Soak the dried wakame in cold water for 5–10 minutes. Drain and set aside. The seaweed should have returned to a vivid green and retain a slight crunch; seaweed that has been over-soaked will be limp and slimy — discard and begin again.
2. 2
   Toss the cucumber rounds with the fine salt in a bowl (shio-momi). Mix well and leave to rest for 10–15 minutes. Osmosis will draw excess moisture to the surface. Squeeze the cucumber firmly in the hands to expel that moisture, but do not wring it completely dry. The rounds should yield to pressure while still holding their disc shape — over-squeezing produces a limp, textureless result with no structural integrity.
3. 3
   Combine the rice vinegar, soy sauce, and mirin in equal parts (1:1:1) to make the sanbaizu. For cucumber, adjustment toward slightly more vinegar yields a tarter result; for seafood additions such as crab, slightly more mirin softens the dressing to match the ingredient's sweetness. Stir until the mirin is fully incorporated. The dressing should smell bright and clean, with no single note — vinegar, soy, or mirin — forcing itself forward. This calibration is where the dish lives or dies: a sanbaizu out of balance will not refresh the palate but assault it.
4. 4
   Combine the squeezed cucumber and drained wakame in a bowl. Add the cold sanbaizu dressing and toss lightly. The vegetables should be evenly coated — not swimming. Set aside for 5–10 minutes before service to allow absorption; dressing applied immediately before serving prevents the dressing from penetrating, while dressing too far in advance wilts the vegetables and progressively dilutes the sanbaizu with released moisture.
5. 5
   Portion into small, chilled bowls. Finish each with a pinch of toasted sesame seeds and the chosen aromatic garnish — grated ginger, yuzu rind, or lemon zest. The garnish is functional: it adds an aromatic counterpoint that lifts the vinegar note. Taste a single piece of cucumber; the dressing should be fully absorbed, and the piece yielding but not limp. The flavour should read as bright, clean, and sweet-tart in sequence.