Planning our honeymoon to Japan for 14 days from March 24th 2018 to April 7th 2018 and trying to figure out if we could possibly get by with just a 7 Day Rail Pass for traveling purposes and to save some money. Also any travel tips for our itinerary below would be greatly appreciated for first timers coming from the US.
March 24th - Land in Narita Airport, heading to Tokyo for 3 Nights
March 27th - Travel to Hakone for 2 nights - Was possibly planning on taking Odakyu Limited Express Romancecar which we know is not covered with JR Pass, it seems harder to get to Hakone on Japan Rail, but maybe we are confused?
March 29th - Travel from Hakone to Osaka directly if possible or head back to Tokyo to get to Osaka for 2 nights
March 30th - Day Trip from Osaka to Nara Park
March 31st - Fly from Osaka International Airport to Naha / Okinawa Island for 2 nights
April 2nd - Fly from Naha / Okinawa Island to Osaka International Airport and head to Kyoto for 2 nights
April 4th - Head from Kyoto back to Tokyo for 2 nights before flying out at Narita back to the US on April 6th
We are already on a tight budget as it is so we don't want to pay for days we are not using the pass though we are not sure if it is cost effective to not get the pass either or make a 7 day pass work based on this timeframe. If we do not need the JR Pass for the entire 14 days our trip is there any way we can get away with the 7 days based on this plan above? There is not any way to pause or defer when our Pass is activated? Or can we pick up our Passes somewhere else besides the airport to defer it for several days?

