The Shimazu clan, a daimyo (feudal lord) (which were called Shugo (provincial constable) in the Kamakura period, Shugo daimyo (Shugo that became daimyo) in the Muromachi period, Sengoku daimyo (daimyo in the Sengoku period) in the Sengoku period, and the lord of Satsuma domain in the Edo period) in Satsuma Province, was also originally from Koremune clan, and Tadahisa SHIMAZU, the founder of Shimazu family, was referred to as KOREMUNE no Hirokoto (the recent widely-accepted theory is that Tadahisa SHIMAZU was a child of KOREMUNE no Tadayasu).
薩摩国の大名（鎌倉時代は守護、室町時代は守護大名、戦国時代は戦国大名、江戸時代は薩摩藩主）島津氏も元来は惟宗氏の出で、島津家の祖・島津忠久は惟宗広言とされてきた（近年では惟宗忠康の子という説が有力）。