Itinerary order & leaving luggage

Hi there,

I am planning a 15 day trip at the end of February & am working on the below rough itinerary:

Tokyo - 3 nights
Hakone - 1 night
Osaka - 2 nights (inc day trip to Nara)
Naoshima - 1 night
Hiroshima - 1 night
Miyajima - 1 night
Kyoto - 3 nights
Tokyo - 3nights

Does this itinerary look good & make sense in the order of locations? Is it worth a 14 day JR pass?

For the trips to Naoshima & Miyajima islands i wondered if there are facilities on the mainland (perhaps in Okayama and Hiroshima) to leave luggage? So we don't need to take all our luggage on the ferries & around the islands?

Thanks!