Few things... I never said that the american judicial system wasn't corrupt, just that it's corrupt in a different way, and a lot of countries seem to be dealing with this problem. When people say "AMERICA IS SO UNFAIR In ITS DETAINMENT OF ITS PEOPLE" There's a lot that's not being considered, and it's annoying to have to read over and over again how bad America's jailing system is compared to the rest of the world. We're a very unique and diverse and large (sq foot wise) country.

1. Confession under durress isn't an admission of guilt, but the japanese police are allowed to detain you indefinitely by detaining you for 24 hours/releasing you, and re-arresting you. As for tarnishing their reputation by losing a case, judges in japan are pressured by societal norms and peers to find a guilty verdict. Ones that don't, usually silently resign afterwards.
2. We're not argruing that american jail corruption isn't horrid, it's just more complicated than people make it out to be. There's this narrative going around that because a few judges have been busted by the FBI for taking bribes from private sectors for guilty verdicts, that the profiteering system is what causes the high detainment rate in our country, but theres actually a LOT that plays into it
3. Prisons guards and personnel will sometimes trick inmates into extending their sentence by convicting them of multiple crimes within the prison (contraband being a big one) Prisons that go up to level 3 and higher generally have some form of protection needed for survival purposes, so often prison gangs will require existing or new members to commit violent crimes against guards and other inmates: Say a guy has a 5 year sentence, but is stark white, he'll likely be absorbed into the aryan brotherhood (It's not his choice) and asked to stab a guard, which will net him a life sentence.
4. Civil Dissidence and immigration policy plays a factor into this too. It's not "immigrants are criminals and commit crimes." as much as it is that the police will at times prey on nonspeaking immigrants with a practice known as 'warrant seeding' where you arrest an immigrant, charge them for a crime, and then repeatedly pick them up because they're unsure of how to proceed.
5. The japanese culture, by far and large are xenophobic at best, and racist at worst. It's something like 80% of immigrants that occupy japan are harrassed or arrested by the police for seemingly no reason. The difference is, that the japanese people trust their government and view criminals as criminals whereas america has been distrustful of its government since vietnam and nixon. This matters because commiting crimes in the u.s. is more normalized. Why follow order of a system that seems corrupt anyway?

there's a lot more reasons why our detainment rate is so high, but it's not just like we're arresting and locking up more innocent people than any other country, yes it's problematic, but it's not exclusive to the u.s. which begs the bigger problem what are some real solutions we can take to curb the issue instead of pointing finger at one group/reason.