Yes they're all korean. (I added a bit more info if you're intrested, if not just ignore it)
[in order of age]
[January 26, 1986] Hero (Yong Wong JaeJoong) was born in Gongju, Chungcheongnam-do, South Korea
[February 6, 1986] U-know (U-know Yunho) was born in Gwangju, South Korea
[June 4, 1986] Micky (Micky Yoochun) was born in Seoul, South Korea, then immigrated to Fairfax, Virginia in the United States, then went back to South Korea
[December 15, 1986] Xiah (Xiah Junsu) was bron in Gyeonggi-do, South Korea
[February 18, 1988] Max (Choikang Changmin) was born in Seoul, South Korea
Super Junior's definitely one of them. But the TVXQ/SJ members themselves are friends.
in Seoul
He disbanded from TVXQ along with members Jaejoong and Junsu. Now they have formed a group called JYJ.
Red!
Tohoshinki
TVXQ was created in 2003.
Hero Jaejong was the leader of TVXQ too but he leave TVXQ and he give to Yunho (maybe O.O)
there's a lot really. one would be that TVXQ in a way "paved" the way for kpop artists in Japan. I think it's also fair to say that they were influenced by 90's KPop boybands like H.O.T. or Shinwha.
Tone - TVXQ album - was created in 2010.
Together - TVXQ song - was created on 2007-12-19.
Super Junior's definitely one of them. But the TVXQ/SJ members themselves are friends.
in Seoul
Forever Love - TVXQ song - was created on 2007-11-14.
All About TVXQ - 2006 V is rated/received certificates of: Japan:G
He disbanded from TVXQ along with members Jaejoong and Junsu. Now they have formed a group called JYJ.
No.
five fovever