Prime Minister Shinzo Abe said Japan's aging, shrinking population was not a burden, but an incentive to boost productivity through innovations like robots, wireless sensors and artificial intelligence.

Abe's comments on Wednesday came days after official data showed that Japan has 34.6 million people aged 65 and older, or 27.3 percent of the population — the highest proportion among advanced nations.

"I have absolutely no worries about Japan's demography," Abe said in a prepared speech at a Reuters Newsmaker event, noting that nominal gross domestic product had grown despite losing 3 million working-age people over the last three years.