The Japan Rail Pass (also commonly called JR Pass) is a very cost effective rail pass for long distance train travel in Japan. It can be used by foreign tourists only, and offers unlimited use of JR trains for one, two or three weeks at a cost that residents of Japan can only dream of.
The Japan Rail Pass must be purchased before your arrival to Japan, because it is not available for sale inside Japan. The pass comes in two types: ordinary and green car. The latter is valid on green cars (first class cars) that offer more spacious seats than ordinary cars.
If you use only a simple round trip between Tokyo and Osaka, you don’t need to buy JR pass.
Normal Tickets (JPY 28900) – JR Pass Ordinary 7days (JPY 29110).
But if you use a round trip between Narita airport and Osaka, it would be better to buy JR pass.
Normal Tickets (JPY 33220 ) – JR Pass Ordinary 7days (JPY 29110).