This is Spycraft 101; Lots of Japanese have been abducted by North Korea to train their spies, build cover stories to live as Japanese (i.e. https://en.wikiped

This is Spycraft 101; Lots of Japanese have been abducted by North Korea to train their spies, build cover stories to live as Japanese (i.e. https://en.wikipedia.org/wiki/Sleeper_agent https://en.wikipedia.org/wiki/Sleeper_agent) across generations etc. Since NK is a proxy for China, one can expect a flow through. See - https://en.wikipedia.org/wiki/North_Korean_abductions_of_Japanese_citizens https://en.wikipedia.org/wiki/North_Korean_abductions_of_Jap... In popular Movie/TV parlance (eg. Russian spies in the USA) these Sleeper Agents are called "The Illegals".