Japan wary over Philippine leader's policies, manners

Japanese officials are wary ahead of the arrival of outspoken Philippine President Rodrigo Duterte. It's not just his foreign policy toward the U.S., but also his informal style: Will he chew gum in front of the emperor?

Duterte arrives in Tokyo later Tuesday for a three-day visit, his first as Philippine leader.

For diplomats and political leaders, the main issue is Duterte's foreign policy toward Washington and how Japan can help mend those ties.

Tokyo is a major ally of the United States, and has watched as Duterte increasingly attacked the U.S. and said he would scale back America's military engagement with his country. And he has worried Japan and the United...