As is my wont, I went looking at the UK experience, and found that at one of the UK’s “immigration removal centres” (that sounds rather ominous to me!), an inmate reckoned:
She tells me that being in prison was better than staying at Yarl’s Wood [immigration removal centre].
There are tales of being denied medicines, no privacy, sexual abuse, etc. A separate BBC report describes slave labour-like conditions for the inmates, being paid just one pound per hour for working in the centre. The detainees in the UK may have more access to the outside world – mobile phones and the internet are allowed – but the problems do seem rather similar to the ones that Hindpal Singh Bhui from Her Majesty’s Inspectorate of Prisons described for Japan.
And for a bonus, the right-wing prime minister praises people many consider to be war criminals.