Asiana was a short-lived Korean heavy metal band that only released the album Out on the Streets in 1990. It featured vocalist Yim Jae-Beom, who also sang on the debut albums by Sinawe and Foreign Legion. After the release of this album, however, he abandoned metal in favor of contemporary Korean music. The song "Soldiers Came" wasn't included on the album, because the government banned it for having lyrics criticizing the military.
Banning songs for military criticism? That sounds like a N Korea thing to do more than South. I'm not sure what South Korea's freedom of speech is like mind you. Didn't realize Yim Jae-Beom was a vocalist in all three bands you mentioned either.
Actually, the South Korean government is very controlling/authoritarian. The internet is heavily censored, and I believe porn is actually banned.
That's a little surprising, though I guess with the mandatory army service I should have expected them to be more controlling than what we're used to.
It's also important to remember that South Korea had a ban on metal throughout the 1980s, hence why a lot of the bands before 1990 putting themselves out as rock bands and/or throwing a few ballads for good measure. Apparently, rock was spared, but not metal...
Actually, it's not so much that South Korea is controlling as it is a bit strict in some ways. Porn is banned for commercial distribution but home made stuff can be produced and distributed among people of legal age freely.
The problem was that the government was still suffering from corruption in the 70s/80s. From what I remember, one of the lead politicians was assassinated around that time. Things settled down in the 90s.
Boowy ~ Dreams Come True ~ Omega Tribe (Sugiyama Kiyotaka/Carlos Toshiki) ~ TM Network ~ X Japan
I know that South Korea goverment did not like the theme of Rock/Metal music, some albums/songs got banned, some released with a 건전가요(Wholesome Song). You can find 건전가요(Wholesome Song) in most of the original vinyl pressing, I think it's a kind of song that used to clean up people mind from the dirty theme of Rock/Metal by the goverment, records company usually drops the 건전가요(Wholesome Song) when re-issue them.