I’m not sure how many people actually read Current History (a dozen?), which, while still quite wonky, is normally more readable and less arduous than Foreign Affairs, though their website offers next to nothing for non-subscribers.
I bring up the magazine here because the September issue is on East Asia and includes worthwhile articles on South Korea, China, and the rest of the region. As a bonus, there’s also an article on North Korea by curmudgeonly old Bruce Cumings – anyone wishing to relive the 60s/70s is urged to pop in a good 8-track, spark up their grooviest bong, and read the Cumings piece. You won’t learn much about North Korea (apparently, they bow less than the South Koreans), but you will get a jarring blast of old-school leftism.
Check it out if you have a chance, though again, the Current History website is nearly useless.