What the U.S. can learn from Japan’s experience with an aging population The U.S. population is older than ever, and that trend is accelerating. As baby boomers age and birth rates decline, the country is heading toward a demographic reality that Japan has been grappling with for decades. In Japan, more than one in 10 people is now over the age of 80, and nearly a third of the population is over 65. This marks a dramatic shift that has reshaped healthcare, the economy, city infrastructure,...