The Tachibana family was a descendent family of TACHIBANA no Moroe, the great-great-grandson (according to another theory, great-grandchild) of Prince Naniwa, the Imperial prince of Emperor Bidatsu, and it was originally from the same family line as Masashige KUSUNOKI, a busho (Japanese feudal commander) who lived during the end of Kamakura period.
橘家は敏達天皇皇子難波皇子の玄孫（曾孫とする説もある）橘諸兄の子孫であり、鎌倉時代末期の武将楠木正成は同族である。