Daycare/Kindergarten is already free across the country for all children starting at 3 years old.
My information might be biased towards the greater Kanto area (Tokyo/Yokohama), but I’m not aware of anybody paying less then 20000 Yen (a little over $100 USD I guess) per month per child for a place in a public daycare (can be more than double, depending on the area/daycare, and much more for private ones).
It’s much more complicated, though. You can receive various support money from the state/prefecture/city, but it’s usually less than what you have to pay. And you’re not guaranteed a place, and the waiting list cam be long (especially in highly populated areas in Tokyo).
I’m not sure why your friends are paying that… Most cities in Saitama, Chiba, and the 23 wards at least I know that the 学費 was set as 無償化.
There are some instances where you don’t qualify for free school if you make too much money. (Or it could just be they didn’t have a good guide at the city office to walk them through the maze of beaurocracy)
Also 23 wards and most of the cities in Saitama and Chiba have daycare and kindergarten entry that’s points based(the larger cities have more kids than daycare spots, which is my favorite bit of irony about the Japanese birthrate problems), the more points you have (points based on need, like are you a single mother, both parents working full time etc.)
