Located near Kamakura station, but Sanmon is located at Myohon-ji side, opposite side from the station.
There was a Ebisu-do at the place arround the current Sanmon, and Nichiren stayed there. Later, Nisshutsu established Hongaku-ji based on Ebisu-do.
Every current buildings are relatively new. The oldest one is the Sanmon, which was built in Edo era.