Osaka/Kyoto base 10 days - is it worth getting a JR pass?

Hi, we are arriving at Osaka for a 10 day stay in Japan in November (to see the autumn colours) and there seems to be so much to see in the Kyoto area and around that we may base ourselves around there and not go much further. Is it worth getting a 7 day pass for travelling round Osaka/Kyoto/Narita/Himeji ?

My husband is keen to go to Dejima, but it seems a long way. Is it worth such a long journey? If we did go there, then I guess a 7 day pass would be worthwhile.

Thank you for any tips you can give - or must-see highlights in the Kyoto area.
Sally