- Airport Limousine bus
- Narita Express (NEX)
- Keisei Skyliner
- JR Sobu (Rapid)
- Keisei Ltd Express http://www.keisei.co.jp/keisei/tetudou/keisei_us/html/o_express.html
If you don't mind travelling on a normal commuter train that makes numerous stops (hence taking a longer time to reach Tokyo)....and probably having to stand with your luggages in tow....choosing the JR Rapid or Keisei Ltd over NEX/limo bus will save you around JPY1700+ (approx. SGD29+).
I'd normally use NEX or the limo bus as I'd be feeling very tired after the long flight. Only on a few occasions that I used the Keisei Ltd. However, this cheapo has found out that there are ways to save on NEX or the limo bus!
Usual fare on NEX to Tokyo is approx JPY3,000. If you were to buy the NEX+Suica package for JPY3,500, your NEX fare will only be JPY1,500 as the stored value for your Suica card is already JPY2,000!
Usual fare on the limo bus is approx JPY3,000. The limo bus+metropass package will cost JPY3,100. Original price of a 1day open metropass is JPY600. So you already save JPY500. The 1day metropass will allow you unlimited rides on the Tokyo metro for a day.
Normal price for skyliner+1day metropass is JPY2,520 and JPY2,900 for a 2-day metropass. The promotional prices are JPY2,100 & JPY2,480 respectively. So your savings are JPY420 for both.
Traveling within Tokyo
1 or 2 day Metropass http://www.tokyometro.jp/global/en/ticket/narita.html
If you think you'll be travelling on the Tokyo Metro a lot, you can purchase the 1 or 2 day Metropass at Narita Airport (the passes are ONLY AVAILABLE at Narita Airport). 1 day pass is JPY600 and 2 day pass is JPY980.
This is like the mother of all passes! It allows you unlimited ride on all JR Group Railways - limited express trains, express trains, rapid or local trains, including NEX and the Shinkasen (except on "NOZOMI" trains). It even allows you to ride on certain JR buses and ferries. This pass can only be purchased by foreign tourists under the entry status of "temporary visitor" and available only outside of Japan from an authorized sales office or agent in your home country. Refer to this website for a listing of the authorized sales offices in Singapore http://www.jnto.org.sg/jprailpass.html
The JR pass ain't cheap at JPY28,300 (~SGD480+) for a 7-day Ordinary pass and JPY45,100 (SGD767+) for a 14-day pass (green passes are more expensive). If you are mostly just travelling within a particular city i.e. Tokyo, then there's no need for the JR pass. But say if you are making long distance rail trips i.e. Tokyo <--> Kyoto, then the JR pass is worth the investment because a normal return fare on the shinkasen for such long distance travel would already cost more than the fare of the JR pass.
Depending on where you are planning to travel to, there are also other regional passes that you can purchase http://www.japanrail.com/JR_regionalrailpass.html. If you are travelling during the school holidays, you can also consider buying the Seishun 18 pass http://www.jreast.co.jp/e/pass/seishun18.html
One very useful online tool that I swear by is the HYPERDIA digital time-table. If you were to type in your starting point and destination, select your travel date/time/type of seat/train type...it will be able to generate a list of all the possible rail courses that you can take and it will also list down all the connections if any http://www.hyperdia.com/cgi-english/hyperWeb.cgi
If you need maps to plan for your Japan trip, do visit the Japan National Tourism Organization (Singapore Office) @ 16 Raffles Quay, #15-09, Hong Leong Building, Singapore 048581 http://www.jnto.org.sg/default.asp