US has expressed disappointment over Abe's visit to Yasukuni shrine
US Secretary of State John Kerry will seek to ease tensions between Tokyo, Beijing and Seoul as he confronts a worsening dilemma for Washington in East Asia, according to observers.
Kerry will visit Asia from Thursday to next Tuesday, stopping off in Seoul, Beijing, Jakarta and Abu Dhabi, US State Department spokeswoman Jen Psaki said in a statement on Sunday.