Our copycat Kewpie mayo recipe combines rice vinegar with sugar, salt, MSG, egg yolks, and vegetable oil. All it takes is one tablespoon of rice vinegar per batch for acidic power and subtly.
My friends and I were wandering through the fish market by the harbour when we came across a vendor selling banh mi thit and another making a rice noodle ... lime juice, vinegar and sugar) but ...