As mentioned earlier, the Imanishi family had worked as so-doshiyori between the early Edo period and the last days of the Tokugawa shogunate but it was after Imanishi-ke Jutaku was first established at the present location in 1650 that they began to perform this role.
今西家は江戸初期から幕末まで前述のように惣年寄役として勤めてきたのであるが、これは現位置すなわち慶安三年に本建物が創立されてからのことである。