These are four Korean actors that are on the HKMDB but have sadly passed since their pages were last updated. I've added the date of their passing, as well as their DOB and some aliases.
Kim Seong-ok
https://hkmdb.com/db/people/view.mhtml?id=54903&display_set=eng

01Nov1935-16Dec2022 + aliases
Park Dong-ryong
https://hkmdb.com/db/people/view.mhtml?id=16039&display_set=eng

19Nov2023
Lee Il-woong
https://hkmdb.com/db/people/view.mhtml?id=75272&display_set=eng

05Jul1942-10May2022 + aliases
Shin Woo-cheol
https://hkmdb.com/db/people/view.mhtml?id=31945&complete_credits=1&display_set=eng

10Jun1947-19Aug2014 + aliases
Losing Park was a bitter pill to swallow, probably one of the most recognisable faces of Korean action, he was in a huge number of Korean martial arts films and cross-overs, so much so that his face is probably known to even the most casual fans of Asian action. He'll be missed but he lives on forever through his films.
RIP