Narita international airport was hit by a passenger check-in system glitch Tuesday, resulting in flight cancelations and delays, its operator said.

According to the Narita International Airport Corp, multiple airlines operating out of Terminal 2 at the major hub east of Tokyo were unable to use automated systems to process passengers and their baggage.

Operations were partially restored at the Japan Airlines' counter four and a half hours after the system trouble began around noon. The hiccup forced the airline to cancel one flight and delay two others.

Airline employees used the phone to process passengers' information and attached temporary tags to check-in luggage. The difficulties led long lines of passengers to form in front of service counters.