Damn, Grandma's still working hard even at her age. If the grandpa passed the test he could've been in one of those robot suits as well and see the cherry blossoms. Also, I guess at least you can pass the test and if you do you do get human rights so there's that. Still for 90-year-olds to have to pass a 3-hour test with no breaks and get every question right is very slim. Still, realistically this is going to be very hard to do in any country as usually the elderly vote more.
Also if Japan actually all those benefits for having kids and more it would actually help the birth rate I feel. Though lowering the age to 14 is too much.
Overall basically the government capitalism and money.