New Transit Yurikamome (新交通ゆりかもめ Shinkōtsū Yurikamome), formally the Tokyo Waterfront New Transit Waterfront Line (東京臨海新交通臨海線 Tōkyō Rinkai Shinkōtsū Rinkai-sen) is an automated guideway transit service operated by the Tokyo Waterfront New Transit Corporation, connecting Shimbashi to Toyosu, passing through the artificial island of Odaiba in Tokyo, Japan, a market in which it competes with the cheaper but less glamorous Tokyo Waterfront Area Rapid Transit (Rinkai Line).
The line is named after the black-headed seagull (yurikamome in Japanese), a common denizen of Tokyo Bay and the official prefectural bird. – wikipedia
I rode this magic line on my first day in Tokyo to see what Odaiba looks like, and to have a peek at Tokyo Big Sight. The view along the line is really wonderful, as one can admire the Tokyo Bay, the Rainbow Bridge, and various places of Odaiba island.
And another funny thing, especially for anime lovers, is that all the stations use the recorded voices of different seiyuu for their announcements ^^