海外 かいがい在留 ざいりゅう邦人 ほうじんでしょう
kaigaizairyūhōjindeshō

Noun
Desu Copula

Expresses probability in a polite manner ("probably…") of 海外在留邦人

1. Probably a Japanese national residing overseas.; Possibly a Japanese citizen living abroad.

Polite
Presumptive
Conjecture