It is a major characteristic of the TOKUGAWA regime to appoint members from shinpan to the posts of the shogunate, and to avoid some powerful tozama daimyo with a large domain from joining the politics of the shogunate as a political adviser.
親藩出身者を幕府の役職に就任させたり、外様の大藩を政治顧問として、幕政に参与させないのが、徳川政権の大きな特徴でもある。