It used to be 2 years old in japan that they could be vaccinated, but with heavy push from the vaccine crowd it is starting to come earlier. There was a major backlash a few years back when many japanese kids died after vaccination, then they backed down for a while. But recently they have resumed the vaccine push and with outside information being suppressed the average japanese knows not the horrors of the vaccine problems elsewhere. I believe it is still voluntary but the fear factor is being pushed.
super