On 28 April 2014, an Airbus A320 making a precision radar approach at Naha in IMC began descent from 1,000 feet QNH at 6nm from touchdown with the autopilot engaged and continued it until successive EGPWS 'PULL UP' Warnings occurred soon after the radar controller had advised four miles from touchdown. Minimum recorded radio height was 242 feet with neither the sea nor the runway in sight. The Investigation noted ineffective alerting by the First Officer, the radar controller's failure to notice the error until just before the EGPWS Warnings and the absence of MSAW annunciations at the controller's position.