Pat the chicken strips dry with paper towels and season with salt and white pepper.
In a large pot or deep fryer, heat the vegetable oil to 170°C (340°F).
In a medium bowl, lightly whisk the chilled egg yolk and ice-cold water together.
Sift the cake flour and cornstarch into the egg mixture.
Using chopsticks, mix the batter briefly; leave some lumps to ensure a light texture and do not overmix.
Dredge each chicken strip lightly in extra flour, then dip into the tempura batter to coat thoroughly.
Carefully lower the chicken into the hot oil in batches, avoiding overcrowding the pot.
Fry for 3 to 4 minutes until the coating is crisp and light golden and the chicken is cooked through.
Remove the chicken with a slotted spoon or spider and drain on a wire rack or paper towels.
Serve immediately with tentsuyu dipping sauce or sea salt.