Should I buy a 14 day pass?

Hello,
We will travel to Japan 17April-2May2016. Our itinerary looks like this.
16th April - Kuala Lumpur-Sapporo (We plan on staying at Sapporo until 20th and hope to visit Aomori as well)
20th- check-out and travel to Sendai...check-in Sendai until 23rd. (In Sendai we plan to travel to Matsushima)
23rd - travel to Tokyo
25th - will start the Alpine from Nagano...overnight in Murodo. 26th finish the Alpine and straight to Osaka.
26th April - 2nd May 2016 will be in Osaka and we plan to visit Kyoto, Nara.
2nd is our departure to Kuala Lumpur.

We also plan to visit Tonami tulip festival.

Can you advice us? Thank you.