It's a bit complicated because only Canada, UK, Australia, and New Zealand are considered to have an equivalent legal system to the US and result in an automatic registration requirement. Convictions from other countries are based on the latest human rights reports from the state department - which is generally positive for South Korea, so the prevailing opinion in online legal commentary is that he will be required to register in the US.
I haven't seen a full break down of this yet though so I don't know. It's not guaranteed but it's not nothing.
See "Foreign Convictions" near the top: https://www.law.cornell.edu/cfr/text/28/72.7
It's a bit complicated because only Canada, UK, Australia, and New Zealand are considered to have an equivalent legal system to the US and result in an automatic registration requirement. Convictions from other countries are based on the latest human rights reports from the state department - which is generally positive for South Korea, so the prevailing opinion in online legal commentary is that he will be required to register in the US.
I haven't seen a full break down of this yet though so I don't know. It's not guaranteed but it's not nothing.
What are we, chopped liver?
--Belize, the Bahamas, Jamaica and numerous even smaller island nations