U.S. Secretary of State John Kerry arrived in Japan on Sunday (April 14), the last stop on an Asian tour aimed at reining in North Korea's nuclear ambitions.

Kerry met China's top leaders on Saturday (April 13) in a bid to persuade them to push reclusive North Korea, whose sole main ally is Beijing, to scale back its belligerence and return to nuclear talks after weeks of threats of nuclear attacks on the United States and South Korea.

Kerry will meet with Japanese Foreign Minister Fumio Kishida and Prime Minister Shinzo Abe during his visit.

In Seoul, Kerry said North Korea would be making a "huge mistake" if it launched one of its medium- range missiles during the current standoff. Japan, separated by less than 1,000 km (625 miles) of water and a frequent target of North Korea's anger, is in easy range.

Also likely to be high on the agenda are Japan's territorial disputes with China and the future of U.S. bases in Japan.

The United States and Japan thi