In the summer of 666, King Yeon Gaesomun died and Goguryeo was thrown into chaos and weakened by a succession struggle among his sons and younger brother.

Prince Go Yak-gwang (高若光), son of the last king of Goguryeo, Bojang, sent to Japan in 666 AD to seek military assistance from the Asuka period Emperor Tenji.

[9][11] In 1934 the Koma Jinja Hosan-kai was founded in order to preserve and restore the shrine, headed by then-Minister of Colonial Affairs Hideo Kodama.

[11] Koma Shrine maintained cultural relevance after World War II, and it was written about by prominent Japanese authors such as Eiji Yoshikawa and Ango Sakaguchi.

[12] The shrine is currently presided over by Koma Fumiyasu, whom according to the Koma-shi keizu genealogical scroll is a sixty-second generation direct descendant of Jakkō.

[9][11] The Koma clan residence (高麗家住宅, Koma-ke jyutaku) located adjacent to the shrine precincts was built in the Keichō era (1596-1615).