okayama station luggage counters

Hi

I have been looking for an answer to the luggage storage at Okayama station. I will be traveling from kyoto to Hiroshima and want to stop in okayama on the way. There will be three of us with our suitcases. I am curious if okayama has a luggage counter or any large storage lockers (need the large to fit the luggage)

I have been looking for a website that shows the station set-up but can't find one.
I do not read Japanese.

Is it possible to do okayama castle, Korakoen, and Kibi plain in a day trip?

Thanks for your help.

It's generally safe to assume that you'll find storage in large stations. Okayama is a pretty big station.

If you don't find any in the main (lower) station area, there are some if you go up into the shopping area above the station and follow the signs to the JR Hotel along the elevated walkway.