There are so much to see and do in Tokyo alone, the easiest way to go on
your own is by train, take the "Yamanote Line" which goes in cycle, it
covers major attraction sites.
Unboard at least at following stations: Ueno,
Akihabara, Tokyo, Shibuya, Harajuku, Shinjuku and Ikebukuro.
If your interested in Japanese Heritage buildings, then "Edo Tokyo Open
Air Architecture Museum" is must see.
I really like this Museum. All the buildings are authentic(few hundread
years old) and each houses are unique(one of its kind).
Admission is very cheap, 350 yen~ 400 yen.
Open 9:30 am to 5:30 pm(closed Mondays),7 minutes by bus from Musashi
Koganei Station on the JR Chuo Line(train).
Board the bus at bay 2 or 3 at Musahi Koganei station North exit.
From Tokyo International Airport(Narita airport to Central Tokyo)
Tokyo International Airpot to Central Tokyo.
For high tech gadgets I would reccomend to visit Akihabara Electronic shops
districts:
Akihabara Electronic Shopping district.
Info on Tokyo.
Tokyo Info.
Japan Information net
Japan Info
Japans'English newspaper.
Japans' English Newspaper.