Nintendo DS ports were the first one releases in the rest of the world.
BTW, I am a great fan of the series, really recommend it.
https://en.wikipedia.org/wiki/Criminal_justice_system_of_Jap...
The conviction rate in Japan is over 99% -- going to "trial" is essentially the same as being found guilty.
The prosecuting attorneys have a lot of discretion over what is prosecuted, and are effectively de facto judges. They may decide to simply not prosecute a case if they feel "character, age, environment, gravity of the offense, circumstances or situation after the offense" makes it unnecessary.
So it's easy to imagine there might be some with quite an ego like Edgeworth or Von Karma -- and a protagonist like our heroic defense attorney would be quite the unusual attorney, indeed! I loved the games even without knowing any of that, but that really makes them all the more poignant and funny for me.
However, that's not all there is to it. You're still innocent until proven guilty in Japan.
There's also probably more in common with the japanese justice system and the US system than different. In practice, the majority of cases in both don't go to trial. In japan, the prosecution will just not prosecute any case they don't think they'll win (and have broad leeway to do so). This results in a 99% conviction rate because, well, there's no reason they can't just drop any case without rock solid evidence. Even in cases where they're confident the suspect is guilty, but they don't think they have enough evidence, they may opt to just drop the case.
In the US, similarly, most cases don't go to trial. The vast majority are also ended under prosecutor discretion, via plea bargains. Both in the US and Japan, most cases skip the proper court system due to the prosecution having power to do so. It's just in Japan, the prosecution also has power to drop the case, while in the US the prosecution can only skip the courts if they get a plea deal, but not if the suspect keeps pleading not-guilty.
Japan has laws requiring evidence in addition to a confession due to understanding that police sometimes force confessions (https://en.wikipedia.org/wiki/Criminal_justice_system_of_Jap...)
In america it's routine for people to be convicted on nothing other than a suspect agreeing to a plea deal even though they didn't do it. "You can get 1 year in jail and get back to your family if you take the plea, or you can risk 30 years in jail if you keep saying not-guilty" isn't at all unusual in the US system, especially since a cop's word is often enough for a guilty sentence.
I'd be happy to be wrong on any of he above details if anyone has separate experience, understanding, or sources.
All that being said, I'd much much rather be arrested in Japan than in the US.
For instance, when applying for a promotion, I've heard that in Japanese culture it is common to get pre-approval from various parties beforehand so that it is ensured before a formal/public application is made; this way, nobody is disgraced by being turned down. Not sure how true that is. But it could apply to the justice system in a similar way; having a high conviction rate means the justice system is effective, whereas trying someone and not convicting them might make the justice system look bad.
Your article says that a study of every legal case since WWII found that it was due to prosecutors not trying uncertain cases, which would seem to be a good thing for the innocent.
There are criticisms about allegedly forced confessions and such, but that seems to be unrelated to the conviction rate itself.
I said the game was a criticism/parody of the Japanese justice system.
I don't have an opinion on the Japanese justice system. I simply do not know enough about it.
(Admittedly, I did say it was easy to imagine that some prosecutors might have a bit of a "god" complex...)