本陣" in Edo period.
When the Tokugawa military government united the country in the beginning of the 17th century, it ordered feudal lords to move periodically between Edo (present-day Tokyo) and his clan, typically spending alternate years in each place. His wife and children were required to live in Edo as hostages. The expenditures necessary to maintain lavish residences in both places, and for the procession to and from Edo, placed financial strains on the feudal lords making them unable to wage war. The frequent travel of the feudal lords encouraged road building and the construction of inns and facilities along the routes, generating economic activity.
400 years ago, feudal lords entered this gate in the lavish palanquin. "Camellia Honjin" was named after the notable Camellia tree standing just by the front gate. It is said to bloom five different kinds of flowers. I'm not sure five kinds. Beautiful multi-petaled camellias.
Furthermore, in front of the entrance this weeping pink ume apricot is proud of its beauty.