Is there reason to believe that the problem is specific to Japan? The video says it's also known to be happening in the US, UK, Italy, and South Korea. Those

Is there reason to believe that the problem is specific to Japan? The video says it's also known to be happening in the US, UK, Italy, and South Korea. Those are 5 very different developed countries, on 3 different continents, and together make up nearly 10% of the earth's population.