Kaiko Hiroba (memorial plaza to commemorate the opening of the Port of Yokohama)

"Kaiko Hiroba (memorial plaza)" is located at the corner of an intersection of Osanbashi (a large pier) street and Yamashita Park street. It is famous as the site where the Japan-America Treaty of Amity and Friendship was concluded. Visitors can feel the history of the Port of Yokohama from historic buildings and a monument around the site.