Residence
noun, verbal noun, の adjective
The place you're detained is where you exist. As long as you're in this place, this will be your residence. Note: mainly means "residence" in the broader sense and is parts of words like "residence card" or "foreign residents."
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
日本在留のアメリカ人と友達になりました。
I became friends with an American who was residing in Japan.
ビザと在留資格は別物です。
Visas and residence status are two different things.
在留期間を延長するには、いったん国外に出ないといけません。
In order to extend your residency, you have to leave the country and then come back.