His younger brothers were rokuro (the sixth son) Tadayori SHIMAZU, nanaro (the seventh son) Sadakata SHIMAZU, and Tadauji SHIMAZU, Aki no kami (Governor of Aki Province) (Echizen family).
弟に六郎島津忠頼・七郎島津定賢・安芸守島津忠氏(越前家)ら。