Tokugawa shogunate
Shogunate institution

During the earliest years of the Tokugawa shogunate institution, when Tokugawa Hidetada coronated as the second shogun and Ieyasu retired, they formed a dual governments, where Hidetada controlled the official court with the government central located in Edo city, Ieyasu, who now became the Ōgosho (retired shogun), also control his own informal shadow government which called "Sunpu government" with its center at Sunpu Castle. The membership of the Sunpu government's cabinet was consisted of trusted vassals of Ieyasu which was not included in Hidetada's cabinet. including William Adams (samurai) and Jan Joosten van Lodensteijn, which Ieyasu entrusted with foreign affairs and diplomacy.

The earliest structure of Edo Shogunate organization has Buke Shitsuyaku as the highest rank. the earliest members of this office were Ii Naomasa, Sakakibara Yasumasa, and Honda Tadakatsu.

The personal vassals of the Tokugawa shoguns were classified into two groups:

By the early 18th century, out of around 22,000 personal vassals, most would have received stipends rather than domains.
startend:quotation