From Narita & Haneda Airports

From Narita International Airport (Time for changing trains is not included.)

Narita Terminal 1, 2 -> Tokyo
Tokyo -> Hongo-sanchome		 Narita Express (JR)
Marunouchi Line		 55-59mins.
7mins.
Narita Terminal 1, 2 -> Nippori
Nippori -> Ueno
Ueno -> The Univ. of Tokyo(Getting off at "Akamon")		 Skyliner (Keisei Line)
Yamanote Line (JR)
Taxi		 36-39mins.
4mins.
10mins.
Narita Terminal 1, 2 -> T-CAT（Suitengu-mae Sta.）
Suitengu-mae -> Otemachi
Otemachi -> Hongo-sanchome		 Limousine Bus
Hanzomon Line
Marunouchi Line		 60mins.
4mins.
6mins.

From Haneda Airport (Time for changing trains is not included.)

Haneda International, Terminal1, 2 -> Hamamatsucho
Hamamatsucho -> Tokyo
Tokyo -> Hongo-sanchome		 Tokyo Monorail
Yamanote Line (JR)
Marunouchi Line		 13-19mins.
6mins.
7mins.
Haneda International, Terminal1, 2 -> Shinagawa
Shinagawa -> Tokyo
Tokyo -> Hongo-sanchome		 Keikyu Line
Yamanote Line (JR)
Marunouchi Line		 13-22mins.
10mins.
7mins.
Haneda International, Terminal1, 2 -> Tokyo
Tokyo -> Hongo-sanchome		 Limousine Bus
Marunouchi Line		 25mins.
7mins.