Tokyo->Hakone->Kyoto->Hiroshima->Tokyo (12 Days): 7 or 14 Day Pass?

Hello!

Itinerary check: Starting Oct 9th to Oct 20th (2 pesrons). Very flexible (besides arrival/departure dates). Basically want to cover Tokyo, Kyoto (+Nara), Hiroshima, Hakone (optional).

Day 1: ARRIVE late at Narita Airport, Go to Tokyo
Day 2: Tokyo
Day 3: Tokyo
Day 4: Tokyo
Day 5: Travel to Hakone (Odawara)
Day 6: Travel to Kyoto
Day 7: Kyoto
Day 8: Kyoto (day trip to Nara?)
Day 9: Travel to Hiroshima
Day 10: Hiroshima
Day 11: Travel back to Tokyo
Day 12: DEPART early morning (Narita)

Same old question: 7day or 14day JR Pass. I want to get around Tokyo easily - explore and do the typical tourists spots. Day trips to Nikka are options. I definitely need a 7day pass for the last 7 days of my trip. But, how about the start of the trip in Tokyo? Is JR pass fine for getting around Tokyo? Or is it easier to get around with metro pass? My intineray is quite flexible, so perhaps a 14 day JR Pass would be worry free...