Japanese are the most pessimistic about the future of their country among people in four Asian democratic countries, a joint survey by think tanks showed Monday.

The other three nations were India, Indonesia and Malaysia.

Forty-eight percent of Japanese respondents said they are pessimistic, up from 39.8 percent last year, citing "no effective measures against a declining birthrate and aging population" as the top reason for their perception. Some 31.3 percent said they are optimistic, up 10.6 points.