There’s a (short) list of countries where loot boxes are illegal [1].
Japan is on that list as well, though I think the Mario Kart micro transactions and gambling like mechanisms are still legal.
Belgium probably has one of the strictest laws: “Looking at various games, such as FIFA 18 and Overwatch, Belgium determined that the randomized risk/reward system innate to loot boxes is tantamount to gambling.” Mario Kart Tour, for example, is simply not available there.
You oughtta see what Roblox is doing. Nothing else quite like encouraging loot crates, minors working on semi-business ventures, stock markets, AND foreign exchanges.
Kids have lost tens of thousands of dollars on their platform. And I'm guessing if they were sued, none of it is binding, because minors.
...also as a nice side effect it would make the video games I like to play cheaper and better.