Reports about primary and junior high school children collapsing and being taken to hospital through heatstroke during practice session for their school athletic days seem to be on the news every day recently, though luckily there have been no deaths yet (some kids have died during bukatsu sports training).
Just for argument's sake, let us suppose that a primary school near the ocean decided to take all the 6th year kids to the beach, only for several of the kids to be hospitalised for stings by a unseasonably large swarm of poisonous jellyfish.
I wonder what sort of reaction there would be from the parents if the school then decided the next day to take all the 5th year kids to the beach.
I would like to think that they would raise a huge stink and lodge serious complaints with the school. But after seeing the almost total lack of any such reaction to the daily incidents with training (both athletic day and sports), I have started to suspect that the parents would just shrug and say, 'it's a school event, so I guess it can't be helped'.