Hull shell and devein shrimps. Boil the water in a pan. Add salt and the shrimps. Boil for 3 minutes. Drain the shrimps in a colander and let them cool.
Mix mayonnaise, soy sauce and pepper. Add the shrimps and mix.
Slice the Japanese radish very thinly. Cut into quarters.
Place one shrimp on each quarter. Insert a stick.