The influence of early Europeans, or Nanban, who first brought deep-frying to Japan a few hundred years ago, is still evident in this dish, known as Kozakana Nanban-Zuke.
Wipe the sprats dry with kitchen paper, then put them in a small plastic bag with a handful of flour. Seal and shake vigorously to coat the fish.
Cut the carrot and cucumber into thin strips by hand or using a mandolin or food processor. Cut the spring onions into three, then slice into thin, lengthways strips. Slice the ginger into thin, lengthways strips and