A group of 146 former Japan Airlines Corp. pilots and flight attendants filed a lawsuit Wednesday with the Tokyo District Court seeking to nullify their dismissals by the carrier at the end of last month.

"It is an absolutely unforgivable act. Many of those who were dismissed are people who supported the carrier for years," Kazuya Chikamura, head of the Japan Federation of Aviation Worker's Union, said at a news conference attended by more than 140 laid-off pilots, flight attendants and their lawyers.

"We will fight to win the right to return them to their former workplace as soon as possible," Chikamura said.