It is difficult to know the reality of its vassals because basic documents concerning the military system and territories of the vassals of the Takeda clan, such as the register of military service and tax ledgers, are no longer exist.
武田氏は、戦国大名家の家臣団に関する軍制や所領の実態が記された軍役帳や所領役帳などの基礎史料を欠いているため、家臣団の実態を知ることは難しい。