About 30 percent of Japanese who answered a government survey said Japan may be involved in a war in the near future, according to the poll results, released Saturday.

The situation on the Korean Peninsula was selected as a factor affecting Japan's security by more than half of respondents to the Prime Minister's Office poll, which is taken once every three years.

The survey covered 5,000 randomly selected voters across Japan in January, of whom 69.2 percent answered.