Toridejuku was a post station on the Mito Road in the Edo period (1603-1868). In1687, the residence of the Someno family, Nanushi (village officer) of Toridejuku, was designated as honjin (the inn for the nobility and daimyo) by the Mito Tokugawa clan. The original building was burned down by fire in 1794 and the existing main building was built in the next year.

It is a large-scale private house in Yosemune-zukuri style, with 19 m wide and 13.3 m deep. The bargeboard on the Irimoya-styled roof (hip-and-gable roof) over the wooden step at the entrance hall gives a dignified impression. The inside of the residence was divided into two sections; the honjin section for lodging and the private section. As did the formal honjin, the honjin section had Jodan-no ma, which was the special room for the nobility and daimyo, and the suite of three rooms.

In the garden stands a stone monument inscribed with a poem written by Tokugawa Nariaki, the 9th lord of the Mito domain, in 1840, when he was on a boat going down the Tone River on his way back to Mito. The stone monument was later presented to the Someno family from the Mito domain, which shows the close connection between the Mito Tokugawa clan and the Someno family.