JR West or the JR pass

Hi,
I presume you are referring to the Kansai Wide Area Pass. You are right that the Wide Pass plus a regular fare ticket to Tokyo comes up less than the full JR Pass. Also yes, you can take the Nozomi on the Kansai Wide Area Pass. However, the Wide Pass only covers up to Kurashiki just beyond Okayama City. If you want to go to Hiroshima, you'll need the JR Kansai Hiroshima Area Pass. If you look at the coverage maps of the regional passes, many cover some smaller non-JR lines that the full JR pass doesn't, but it's irrelevant for your plans.

You can see regular fares, routes and schedules on Hyperdia.
Under "More Options", be sure to uncheck the Nozomi box since you can't ride that train using the full JR pass.

Good luck.

I'm referring to the JR Kansai Hiroshima Pass that has Kyoto, Nara, Hiroshima etc all in.

But I'm not sure if it has same coverage as the default JR Pass.

Thanks,

Hi,

The full JR Pass covers all JR routes nationally, as expected, while the regional passes only cover certain areas. You can see the coverage map of the JR Kansai Hiroshima Area Pass in the link above.

The JR Kansai Hiroshima Area Pass plus a regular fare ticket from Kansai to Tokyo does in fact come up cheaper than the 7 day JR Pass, but not by much.

Best of luck.