Web links to major transportation companies.
Narita Express (http://www.jreast.co.jp/e/nex/) airport train
Keisei Skyliner (http://www.keisei.co.jp/k...) airport train
Airport Limousine (http://www.limousinebus.c...) airport bus
Yurikamome (http://www.yurikamome.co....) main transport in Odaiba
Rinkai Line (http://www.twr.co.jp/) direct connection to city center
Tokyo Metro (http://www.tokyometro.jp/e/) subway lines in Tokyo
Toei lines (http://www.kotsu.metro.to...) subway and buses in Tokyo
Odaiba is linked to Tokyo proper by many bridges and tunnels, including the scenic Rainbow Bridge.
On foot
You can in theory cross the Rainbow Bridge on foot for free, if inhaling exhaust for 40 minutes sounds like your idea of a fun time. Bicycles are not allowed on the bridge.The view over the Port of Tokyo is nice especially around sunset, though in winter Nov to Mar, you have to enter by 5:30PM and to exit by 6PM. In other months you can enter the pedestrian part of the road from 9AM-8:30PM 30 minutes before you have to exit. Closed on the 3rd Monday every month and 29-31 Dec.
Keep in mind that the Shibaura-side entrance can be hard to find, and that you have to choose which side to walk beforehand.The northern side is recommended if you wish to look at buildings in the city center from above the port.
By bus
Toei city buses (http://www.kotsu.metro.to...) provide cheaper ¥200 per ride if slower access to Odaiba. è¹01 connects to Hamamatsu-cho, æµ·01 connects to Monzennaka-cho, æ±16 connects to Tokyo station from Tokyo Big Sight. A few special bus services to other destinations are available weekends only. The private bus company Keikyu operates buses to Haneda airport (http://www.keikyu-bus.co....), and Shinagawa and Yokohama directions (http://www.keikyu-bus.co....).
The free Bay Shuttle bus runs along a circular route within Odaiba round-trip ca. 40 minutes connecting the parking lots and museums in Aomi district with the shopping malls, the hotels and the Fuji TV building. Unfortunately, stops are hard to find so try to ask at the information counters of shoppings malls, ticket counters, etc.
By ship
Suijobus Ferries (http://www.suijobus.co.jp...) also operate between Hinode Pier on the Yurikamome line and several stops in Odaiba. ¥400 one way. Tokyo Mizube Line (http://www.sumidas.com/ry...) Japanese only offers general transportation and special cruises.
Some of the boats connect to Asakusa along the Sumida river and to Kasai Rinkai Park near Tokyo Disney Resort.
By train
Most visitors arrive in Odaiba via the automated Yurikamome (http://www.yurikamome.co....) "new transit system", a cross between a train and a bus, from Shimbashi on the Yamanote line or Shiodome station on the Toei Åedo Line subway. An attraction in itself, the driverless elevated trains cross the Rainbow Bridge with a 270-degree loop for some great views of Tokyo bay. One-way from Shinbashi to Daiba station will set you back ¥310 any station farther will be ¥370, or you can buy a one-day pass for ¥800. You can also buy the cheapest ticket from Shimbashi to Shiodome for ¥180 and ride to the end of the line and back without exiting for excellent views of the island if you're tired of walking or feeling especially frugal.
The other option is to take the Tokyo Waterfront Area Rapid Transit Rinkai Line (http://www.twr.co.jp/, Japanese only) from Åsaki on the JR Yamanote Line or Shin-Kiba on the Metro Yurakucho line. Many of the trains connect directly from Åsaki to Shinjuku, Shibuya, Ikebukuro, Åmiya, and Kawagoe via the JR-East SaikyÅ Line. While slightly faster, the train travels mostly underground and doesn't provide much in the way of views.