This is the 894th most frequent Japanese word.
在住
"Residing" or "living in."
In this sentence, '在住' is used to describe residency in Tokyo.
東京在住です。
I live in Tokyo.
In this context, '在住' is used to specify the quality of residing in a foreign country.
彼は海外在住として知られています。
He is known as someone who resides overseas.
Here, '在住' indicates the author's living location in Osaka.