Gin-no Suzu Square located on Central Underground Passage (inside of the station gates) is a well know meeting spot of Tokyo Station. The current “Gin-no Suzu”, the 4th objet, is beautifully curved in intaglio of dolphins on the string (the central part) of the bell.
Take the Tokyo Monorail to Hamamatsu-cho, and from Hamamatsu-cho, about 35 minutes on the Keihin-Tohoku Line or Yamanote Line About 40 minutes on the Limousine Bus (Bound for Tokyo Station Yaesu South Exit)