>>I have checked out Hyperdia which tells me the way to structure the fare but it doesn't actually give me the price of the fare (with or without a seat reservation).<<

It does tell you the actual price, as well as distance. Please look again.

Hiroshima-Kyoto on Hikari or Sakura Service: Total: 10,790 yen (seat reserved, ordinary class). Without seat reservation, it's 10,280 yen.

www.hyperdia.com/en/cgi/en/search.html…

If you use the Nozomi or Mizuho service calling at fewer stations, Total: 11,090 yen (seat reserved).

Kyoto-Odawara (base for Hakone) is Total: 11,750 yen (seat reserved)

Odawara-Tokyo can be done in several other ways, but if you use the Shinkansen, it's 3,640 yen (seat reserved, ordinary class).

Thank you so much, I couldn't find it. Can I book these tickets online through this site? Also, by any chance do you know if the Shinkansen goes direct from Odawara to Narita or Haneda airports?

Thank you again.

The Hyperdia link that Yobeekool gave you will give you train routing options and fares. You can't purchase tickets online ahead of time.

You'll need to change trains in Tokyo (Shinagawa) to get to HND or NRT from Odawara.

Just buy your tickets upon arrival at a JR Travel Service Center or the Ticket Window. Usually, trains aren't sold out. As you are just buying individual tickets, spend the few extra hundred Yen to get reserved seats.