Japan's nuclear dilemma

The selection of Hiroshima as the site of the G7 is a clear signal that nuclear disarmament will be one of the key issues at this year's summit. For Japan, the subject presents a particular challenge. As a country that has experienced the devastation caused by atomic bombs, Japan has a deeply rooted desire to ensure that it never happens again. But Japan is also beset by growing nuclear threats. And it depends on the deterrence provided by the nuclear umbrella of the United States. NHK World's Yoshida Mayu has more on this delicate balancing act.