also: さんこくじん
noun
national of a third country
Neutral legal/administrative term for a person from a country other than the two directly involved in a bilateral context (e.g., Japan and another nation).
この協定は、三国人の入国手続きを簡素化する。
This agreement simplifies entry procedures for nationals of third countries.
noun
foreign resident in Japan (derogatory, esp. Chinese and Korean)
Derogatory term historically used in post-WWII Japan to refer to former colonial subjects (especially Chinese and Korean) who remained in Japan; now considered discriminatory and offensive.
戦後、一部の排外主義者が「三国人」という蔑称を使った。
After the war, some xenophobes used the derogatory label 'sangokujin'.