Two Nagasaki atomic bomb survivors pressed countries participating in negotiations Monday for a first-ever treaty banning nuclear weapons to realize their dream of seeing the landmark document adopted next month.

"Nagasaki must be the last place to suffer from an atomic bomb (attack)," said Masao Tomonaga, who was 2 years old when the second atomic bomb was dropped on Nagasaki on Aug. 9, 1945, three days after the first attack destroyed Hiroshima.

Having "narrowly escaped" the blast from his home, located 2.7 kilometers from the epicenter, Tomonaga went on to become a doctor. He spent years researching the inhumanity inflicted on his patients and fellow survivors, who are known in Japanese as hibakusha.