It is the staircase used in "Yor mame". It is also the staircase where Taki and Mitsuha meet accidentaly in the final scene. It is the staircase of the Suga temple, located in Yotsuya, where many tourists go to take pictures. The only way to take a picture without people is to go there early in the morning. In reality, a building is present to the right of the staircase. Moreover, it is actually impossible to see the Roppongi Hills from this place. Director Shinkai use this methods.