Peel the daikon radish and carrot. Using a sharp knife or a mandoline slicer, cut them into thin julienne strips about 2-3 inches long.
Place the julienned daikon and carrot in a bowl. Sprinkle with 1 teaspoon of salt and gently mix. Let it sit for about 10 minutes.
Squeeze the excess water out of the daikon and carrot with your hands then discard the water and return the daikon and carrot to the bowl.
In a small mixing bowl, combine all the vinegar ingredients and let the sugar dissolve completely.
Pour the vinaigrette over the daikon and carrot. *3
Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to an hour. This allows the flavors to meld and the vegetables to pickle slightly.
Before serving, give the namasu a gentle stir. You can garnish it with a sprinkle of toasted sesame seeds if desired.
Serve as a side along with other dishes.
Notes
*1 If you get a whole daikon, use the top 1/3 of the daikon which is crunchy and sweet.*2 You can substitute rice vinegar with apple cider vinegar or white vinegar.*3 If you let it rest for about an hour, the vinegar seasonings will be absorbed by the daikon and carrot and you can enjoy a settled more mellow flavor. *4 Can store in an airtight container for a week in the fridge.