I'm a big fan of the Japanese noise rock band Les Rallizes Denudes. I would recommend them to anyone who likes long loud screaming garage rock music with very heavy feedback. The only problem is most of their music is bootleg quality live recordings. Some of their best tracks are Field of Artificial Flowers, Strung Out Deeper Than The Night, The Last One, Enter The Mirror and Night of the Assassin. I got into them from looking at a thread about obscure heavy psyche bands and someone suggested this band. The language barrier doesn't bother me at all (their music is so loud and feedback heavy that you probably wouldn't be able to understand them even if they sung in English).

I've never listened to korean music but I am addicted to japanese music, I listen to it all the time to the point a lot of the openings from animes I can sing them even though I know no japanese really.

Yeah, I listen to Japanese Pop a lot of the time, It's pretty much my favorite type of music. Although... I enjoy all music, It's just fun to listen too, I learned about it mainly from watching Anime but I then started seeking it out to just listen too, It's really kinda interesting, As for the language barrier... No, I can speak enough Jap to understand what gets said during the songs, And they also have Subtitles when they don't.

I listen to Japanese music more than I do English. My favourites would be Morning Musume - Lovendor - Alice Nine - GazettE - Royz - Gakido. Hm I don't have a favourite but I do have favourite from each band so I will list those.

MM - Shabondama.
L - Doesn't really have their own music yet.
AN - Rainbows or Q.
G - Psychedelic Heroine.
R - eve:r
G - Happy maker.

I got into Japanese music originally in 2007 right as Bou left An CafÈ, I was so annoyed that he left that I stopped listening to it until 2010-2011 when I discovered GazettE. Their music got me interested in Jrock/visual kei and eventually that led to Japanese music in general though I still prefer Jrock/visual kei over any other type of music Morning Musume (a jpop girl group) is actually my favourite band that I have listed.

With the language barrier I feel it does and doesn't, it does in the fact that I can't listen to the song and understand it's true meaning without looking up the lyrics but you don't need to know the words to be able to enjoy music or feel an emotion whilst listening to it. The first Japanese song that brought an emotional response from me was a song by GazettE (not posting the title due to the lyrics) I was listening to it from a live recording and just the way it was sang/performed/sounded reduced me to tears you could hear the pain in Ruki's voice. So I do think it depends on why you are listening to the music.