Japan has no intention of joining a U.N. treaty banning nuclear weapons, Prime Minister Yoshihide Suga reiterated Friday, voicing doubts about the effectiveness of an agreement that is not supported by nuclear weapons states.Suga also said Japan would be "cautious" in considering observer status for the treaty, which took effect the same day following ratification by more than 50 signatories."As the only country to have ever suffered atomic bombings during wartime, Japan has a responsibility to take the lead in efforts by the international community to realize a world without nuclear weapon…READ FULL ARTICLE