The Japan Rail Pass is the most convenient way to travel throughout Japan, there are also other types of passes that are limited to regional use.
Similar to the nationwide Japan Rail Pass, Regional Passes allow the same unlimited travel benefits on designated Japan Rail trains, buses, and ferries within that region.
The 3 day, 5 day, and 7 day passes allow you to choose the starting date, and can be used consecutively starting from the exchange date. Only the flex 4 day pass allows you to freely choose 4 days out of a 10 day period, starting from the exchange date, to ride the trains.
The following sites can provide you with more details about these regional passes. Vouchers can be exchanged at designated locations.