If you want to build your itinerary by yourself, Hyperdia will help you a lot. This site is transportation search engine. You can search the timetables and routes of all trains, flights and airport shuttle bus. I think this site is most convenient site. But this site may be too many functions and options for you. You may be overwhelmed to use this site.
I have received many inquiries about Tokyo-Osaka one way trip. I always recommend to use single ticket for long distance transfer. like from Tokyo to Kyoto, Tokyo to Osaka or Osaka to Nagoya. Because it is cheaper than Japan Rail Pass 7 days pass. I wrote the post about fare calculation before.
But I think this post was not enough to explain the fare rule. JR single ticket rule is very complicated for the tourists from oversea. But you don’t need to understand everything. If you understand some basic rules, single ticket is more useful and it may save your cost.
This website shows you how to use Japan Rail Pass. But some of visitors have a plan to buy a single ticket. Even Japan Rail Pass user need to pay a single fare when they want to save the pass. So I would like to share the useful links and the information with you. Continue reading Guide to plan your trip. Fare Calculation