Depends where you're heading to. A lot of malls around Shinjuku station. If you're coming from Narita, Narita Express does stop over here. For Haneda, you can take the airport limousine bus instead. Very convenient with Shinjuku Bus Terminal - there's many highway buses to other parts of Japan.
i am very impress wif japan train sytem, unlike sing, sing will nvr get close to their standard , not even 20yrs times.
the shinjuku bus teminals can get to further out tokyo, very convenient.
Well , tokyo is a city, goin tokyo will need to feel e tyoko city, dat is most important.
shibuya and shinjuku is a not to miss.