As one of the world's most populous cities, Tokyo has two major airports: Narita International Airport (NRT) and Haneda ...

Airport Limousine Bus reports operating over 1,200 departures daily between Tokyo-Narita and Tokyo-Haneda Airport. Discounted rates for international tourists start at around $12 (1,900 yen) each way.

Kan-etsu Transportation Co., based in the Gunma Prefecture city of Shibukawa, began accepting reservations for the "Ikaho Shima Hot Spring Haneda Line" express bus service on Oct. 1.