Almost as many people in Japan view the U.S. as a "major threat" as those who view an increasingly antagonistic China as a significant global concern, a new poll has found.

The survey, conducted between May and August last year by the Washington-based Pew Research Center and released Sunday, found that climate change was the top international security concern, with 13 of the 28 nations surveyed singling it out.

For Japan, climate change was the No. 2-ranked threat, behind cyberattacks from other countries.