All cities in Japan are connected by efficient train network. By making use of the convenient train systems, you can travel Japan from north to south. To be able to travel efficiently and economically by train, however, you need to find the route and plan the itinerary in advance by checking the timetables.
Hyperdia is an online route search engine provided in Japanese, English, and Chinese that is extremely helpful to find the route and timetable. Especially if you are going to use JR Pass to get around Japan, doing a research on the train route that allows the use of JR Pass will make your trip more efficient and economical.