Japan Airlines publicly apologized Wednesday after a drunk pilot caused the delay of three flights, prompting its second reprimand from the transport ministry in under a year.

Axar.az reports, citing Japanese media, Japan's transport ministry on Wednesday reprimanded Japan Airlines Co. and urged it to report back on preventive measures it will take after an incident in which a pilot was unable to fly from Hawaii to Japan after failing a preflight alcohol screening, delaying three flights for hours.

The major Japanese air carrier has in recent years faced multiple similar drinking incidents involving its pilots, and it comes after a previous warning given to JAL in December by the Ministry of Land, Infrastructure, Transport and Tourism.

The ministry said JAL employees lacked due consideration for safety, urging the company to compile measures by the end of the month to prevent a repeat.

"We take this issue very seriously and deeply apologize for causing trouble and worries," JAL President Mitsuko Tottori told a press conference, adding that her company will fire the pilot.

Tottori said JAL will carry out stricter monitoring and use health data and other criteria in determining whether pilots can fly. Four of the company's pilots were suspended from flying, she said.