For long-distance bus travel, there is the Japan Bus Pass. The Japan Rail Pass allows unlimited rail travel in Japan to foreign visitors. This also includes travel by a bullet trains system. Highway buses are a cheap way to travel in Japan. Willer Express offers more than a hundred bus routes covering Japan. They also have an online reservation facility and payment system in English. One of the popular outdoor activities in Japan (when in a city) is to rent a bicycle for exploring cities of small to medium size.