Kyoto to Okayama, bullet train ?

The fastest way by train and one change if possible as I have a JPN R.P

Thank you

Yes, the pass is valid on hikari and kodama trains, but not on nozomi trains.

There is one direct hikari connection per hour between Kyoto and Okayama. A second hourly hikari connection requires a transfer at Shin-Osaka.

Timetables (select "except nozomi" option):
http://grace.hyperdia.com/cgi-english/hyperWeb.cgi

http://grace.hyperdia.com/cgi-english/hyperWeb.cgi

use that but dont delect nozomi if I going to use JPN RP but use any other one ?

I don't understand your question.

Check the "except nozomi" option to get results without nozomi trains, the trains you cannot use with the Japan Rail Pass.

If I go anywhere in Japan using the JR pass and I want to use the website to know where I am going

I take it dont select Nozomi option because JR doesnt cover that

The nozomi is one of a few JR trains, which are not covered by the Japan Rail Pass. So the "except nozomi" checkbox is a nice tool to exclude it from timetable searches.

Of course, the Japan Rail Pass is not valid on non-JR trains, which can also be included in timetable search results.