Interesting reading about the History between Korea and Japan, contraversial as well,

http://www.asianresearch.org/articles/2352.html

http://japanfocus.org/article.asp?id=308

http://www.ease.com/~randyj/rjjingu.htm

http://gias.snu.ac.kr/wthong/publication/paekche/eng/paekch_e.html

http://www.wsu.edu/~dee/ANCJAPAN/YAMATO.HTM

http://www.dpg.devry.edu/~akim/sck/jpn6.htm

Martial Art Style Tang Soo Do