However, the pedigree of the Shimonokuni family before the time of Morisue varies depending on the various family trees, and as some of the names that appear in some family trees do not concord with the names that appear in the first class historical materials, the credibility of these genealogical records is questioned and the reality is still under study.
が、盛季以前の下国家の系譜は諸系図によりまちまちであり、一級史料に見える名と系図の名が一致しない等系図の信憑性に疑問が持たれているため、実態については、いまだ研究の途上にある。