Tokyo-Osaka-Kumano Kodo-Osaka-Kyoto-Tokyo

Hi,

My boyfriend and I are coming to Japan in March with the following itinerary:

March 25-27: Tokyo
March 27: Train from Tokyo to Osaka
March 28: Train Osaka to Tanabe
March 29-April 1: hiking the Kumano Kodo
April 1: Travel Hongu to Osaka
April 2: Train Osaka to Kyoto
April 2-5: Stay in Kyoto
April 5: Train Kyoto to Tokyo
April 5-7: Stay in Tokyo then fly home

Please could you let me know which Shinkansen pass is best suited for our trip?

Thanks so much :)

Ella