Even if you have the mental strength to resist interrogation and not make a false confession, it might be in your interest to confess to speed things up.
If you no-showed at work for 3 weeks, would you lose your job? But if you confess, you could be out today.
Here is an account of being arrested and detained in Japan[1]. It's worth a read, especially given the ending.
[1] https://nymag.com/vindicated/2016/11/truth-lies-and-videotap...