7 days JR Pass price is almost same as round trip fare between Tokyo and Osaka by Shinkansen. That means if you have one way trip from Tokyo to Osaka or reverse, JR Pass is not worthwhile using. However if you add some trips when you stay in Osaka and Tokyo, you may use JR pass 7 days.
Japan Rail Pass (a.k.a. JR Pass) covers all JR lines throughout Japan. This is only rail pass that covers throughout Japan. If you travel even a round trip to Osaka from Tokyo, the price of 7-day pass almost equal to normal fare. I think this pass gives the greatest deal to the travellers who wants to travel in Japan.
This website shows you a lot of the train passes. But some of you plan to buy a regular ticket. Even if you will use the rail pass, you may have to compare the price of the pass and the regular fare to make sure that you can get the worth of it or not.
In this post, I would like to share the information about the fare calculation with you.