Pandemic travel news: Asia vacations just got easier
https://edition.cnn.com/travel/article/pandemic-travel-south-korea-singapore-indonesia-reopening/index.html
As far as I know, travelers can enter Asian nations listed below without isolation or isolation within a day from April 1, if they are vaccinated 3 times and have certification of PCR test.
South Korea, Japan, Vietnam, Thailand, Philippines, Malaysia and Singapore.