As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NRT - CREW REPORTED STRONG ELECTRICAL ODOR WAS DETECTED IN BUSINESS CLASS AROUND SEATS 11BD, 12BD AND 13BD. POWER PORTS AND INFLIGHT ENTERTAINMENT WERE TURNED OFF AND SMELL DISSIPATED. FLIGHT LANDED NRT WITHOUT INCIDENT. FOUND AFT UPPER RECIRCULATION FAN HAD OVERHEATED. DEFERRED FAN PER MEL 21-3A AUTH10-215C-C. SYSTEM GROUND CHECK NORMAL OPERATION.