01 - Place the daikon, carrots, cucumber, and bell pepper in a large bowl. For extra crispiness, sprinkle 1 tablespoon salt over the vegetables, toss thoroughly, and let stand for 15 minutes. Rinse under cold water and drain well.
02 - In a small saucepan over medium heat, combine rice vinegar, water, sugar, and salt. Stir continuously until sugar and salt are completely dissolved. Remove from heat and allow to cool to room temperature.
03 - Layer the vegetables, chilies, garlic, and peppercorns into a clean 1-quart glass jar or container, packing tightly to maximize space.
04 - Pour the cooled brine over the vegetables, ensuring all pieces are fully submerged. Seal the jar tightly with the lid.
05 - Refrigerate for at least 2 hours before serving. For optimal flavor development, allow to marinate overnight. Consume within 2 weeks for best quality.