Onarimon

It was built as the back gate of Zojoji Temple, but it was used exclusively when shoguns visited the temple, so it came to be called "Onarimon". Initially, this gate was located at the current Onarimon intersection, but it was moved to this location when a new road was built to Shiba Park via the Sanmon of Zojoji Temple in Uchisaiwaicho in the Tokyo City Ward Revision Plan in Meiji 25.

Together with the Sanmon gate of Zojoji Temple, the Koumon Gate, the Somon and Nitenmon Gate of the Tokugawa Family Cemetery, it escaped the Great Kanto Earthquake and the Pacific War to this day.