Make use of a kitchen area thermometer to examine the oil temperature. The swiftest and most accurate technique is having an quick-browse thermometer instead of doing the guesswork you. The optimum oil temperature for chicken katsu is 340ºFile (170ºC). The places range in measurement from close to 5mm to 1cm. https://chickenkatsu15925.elbloglibre.com/32704490/how-much-you-need-to-expect-you-ll-pay-for-a-good-chicken-skin