According to the combined fleet site the E-27 radar detector became available in April 1944. Clair Blair states in
Silent Victory that this is probably how the battleships
Ise and
Hyuga were able to evade the large sub net Admiral Lockwood had prepared for them when they made their last run from Singapore to the Home Islands. Lockwood later wrote "It was a bitter pill to take and I make no alibi."
http://www.combinedfleet.com/radar.htm
E-27
Became Operational: April 1944
War Status: used in war
Purpose: ESM warning indicator
Wavelength: 75-400 cm
Peak Output: n/a
Transmitter: n/a
Receiver: UN-955
Detector: n/a
Detected: enemy radar/radio use 300 km
Weight: 40 kg
Number Built: 2500
Antennae: unknown