The pollster pointed out that the number of proponents of constitutional changes rose by 5 percent since last year, while the number of those, who opposed the idea, decreased by 4 percent.
Earlier in the day, The Yomiuri Shimbun newspaper published an interview with Japanese Prime Minister Shinzo Abe, who expressed hope to amend country's constitution in 2020.
The survey was conducted on April 27-29, ahead of the 70th anniversary of Japan's constitution, which is celebrated on May 3. The results of the poll are based on answers provided by 1,579 people.
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