In Yokohama, there are 3 towers called "King", "Queen" and "Jack". Each tower is still used and familier with visitors.
Tower called King is Goverment office of Kanagawa Pref. Queen is used as Custom office and Jack is used as a conference or meeting facility. They locate in Kananai area between Kannai station to Bay area.
This is King
This is Queen
This is Jack