Shinkansen from Tokyo to Kumamoto

I'm going to be traveling from Tokyo to Kumamoto. I checked the schedules on Google and it seems only the Nozomi Shinkansen goes that way. I have a rail pass and was wondering if I have to pay extra or because it's the only shinkansen will JR forgive the added expense.

Nozomi does not go to Kumamoto.

Hikari to Shin-Osaka, transfer to a Sakura for Kumamoto.

Please use Hyperdia.

http://www.hyperdia.com/en/cgi/en/search.html?dep_node=TOKYO&arv_node=...

If that rail pass meant "Japan Rail Pass"
not covered "Nozomi" btw Tokyo and Hakata
and "Mizuho" btw Shin-Osaka and Kumamoto/Kagoshima-chuo.

Read again Pass official web.
http://www.japanrailpass.net/en/index.html
http://www.japanrailpass.net/en/about_jrp.html#bm_003
http://www.japanrailpass.net/img/about_jrp/file/shinkansen_en.pdf
So take "Hikari" until Shin-Osaka or Okayama first
then take "Sakura" until Kumamoto.

Google map is no function for Japan Rail Pass's validity trains.
Use HyperDia like this on late next week.
http://i.imgur.com/49u7aXS.png
(Updated yet for New timetables which starts fr 4 MAR this weekend)

Pls don't forget travel date and times in this case.