Helsinki.
Edit: here's a link that lists Japan as a country whose passport holders can enter through the e gates (in addition to the many countries that can use them to exit).
https://www.finavia.fi/en/airports/helsinki-airport/airport/services-facilities/automated-border-control#:~:text=Helsinki%20Airport%20has%20dozens%20of,in%20advance%20is%20not%20needed.
Edit 2: I was pretty sure it was available for South Koreans as well, and a bit more googling seems to confirm that.
Interesting, thanks
@jellybaby started
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Helsinki.
Edit: here's a link that lists Japan as a country whose passport holders can enter through the e gates (in addition to the many countries that can use them to exit).
https://www.finavia.fi/en/airports/helsinki-airport/airport/services-facilities/automated-border-control#:~:text=Helsinki%20Airport%20has%20dozens%20of,in%20advance%20is%20not%20needed.
Edit 2: I was pretty sure it was available for South Koreans as well, and a bit more googling seems to confirm that.