US Marines chief acknowledges worries on Japan-Korean ties

Gen. David Berger, the new U.S. Marines commandant, acknowledged Wednesday that he is concerned about deteriorating relations between Japan and South Korea, both key regional allies, but expressed hopes politicians would work out a resolution.

Berger stressed that Japan and Korea have common interests despite their differences, such as the threat posed by China and pursuing stability in Asia.

"I'm optimistic it will get worked out," said Berger, during his first trip to Japan after being appointed to his post.