Best value travel

We are travelling to Tokyo from Narita airport on 13 April and have 4 nights there before we fly from Haneda airport to Kushira.
During our stay in Tokyo we are considering a trip to see the snow monkeys and/ or trip to Fuji.
We are flying from Kushiro to Osaka on 20 April but need to get to Kyoto on this day where we are staying 4 nights before flying to Hongkong from Narita airport. We may visit Nara whilst in Kyoto but definitely need to get back to the airport from Kyoto.
If we did all the travelling I am proposing would a 14 day pass be best value.
If I were to order a 7 day pass could I activate it in Osaka and use it to get to Kyoto, travel round from there and get back to the airport. Would it be worth it.
Are there any discounts from Narita into Tokyo and onto Haneda
Your help is appreciated
Regards Sue P