As for all kinds of Daimyo (Japanese feudal lord), Mito Tokugawa family (Mito Domain) who were obligated to live permanently in Edo by Ieyasu TOKUGAWA and lords of domains (mainly fudai daimyo [a daimyo in hereditary vassal to the Tokugawa family]) who held public posts of Edo bakufu including roju (member of shogun's council of elders), wakadoshiyori (a managerial position in Edo bakufu), and jisha-bugyo (magistrate of temples and shrines) and stationed at Edo-jo Castle were of course Jofu because they needed to live permanently in Edo.
諸大名にあっては、徳川家康によって江戸定住が定められていた水戸徳川家（水戸藩）と、老中・若年寄・寺社奉行など江戸幕府の公職にあって江戸城に詰めている藩主（主に譜代大名）は、江戸に定住する必要性があったので、当然に定府となる。