Drain and squeeze out the water well, and cut into easy-to-eat pieces.
Grind 1 tablespoon of the toasted sesame seeds, and use the rest whole.
Finely julienne the cucumber, sprinkle with a little salt (not listed in the ingredients) and leave for a while.
Lightly squeeze out the moisture.
Make the vinegar sauce: Put the vinegar, sugar and oyster sauce in a heatproof container.
Microwave for 1 minute and mix well.
Put the kiriboshi daikon, cucumber, the Step 3 vinegar sauce, sesame seeds (the ground up and whole ones both), and sesame oil in a bowl, mix together well and it's done.
Double the recipe, and serve as a side with yakiniku (griddle-cooked barbecue-style beef).