Hatamoto (direct retainers of the bakufu, which is a form of Japanese feudal government headed by a shogun) and gokenin (immediate vassals of the shogunate) except kotaiyoriai (alternate yoriai, a family status of samurai warriors) who performed Sankinkotai were Jofu because they lived permanently in Edo and served seii taishogun.
参勤交代を行う交代寄合を除く旗本・御家人は、江戸に定住して征夷大将軍に仕えたため定府である。