JAL had previously stated that the flight's co-pilot claimed the alcohol detection was a "false positive," which influenced their decision to allow the flight to proceed. However, subsequent investigations revealed that during hearings with the Ministry of Land, Infrastructure, Transport, and Tourism, the co-pilot denied ever making such claims. JAL acknowledged this discrepancy, stating, "It is possible that the facts were not fully verified." Further reports indicate that the co-pilot vomited aboard the aircraft, prompting cabin crew to express concerns to headquarters about the co-pilot's ability to operate the flight safely. Despite multiple warnings from crew members, JAL proceeded with the flight, exposing shortcomings in its decision-making processes.