The widow of an official who committed suicide after lying during a probe into a 1995 accident at the Monju fast-breeder reactor demanded on Monday 148 million yen in damages from the reactor's operator.

During the opening session of the suit brought before the Tokyo District Court, Toshiko Nishimura said her husband, Shigeo, was not the kind of person to commit suicide. She said she wanted to know why he took his own life.

"Nine years have passed since my husband's death and I still have a hard time believing he committed suicide," Nishimura said.