The most relevant JR pass / JR regional pass

Dear all,

Could you help me please to choose the most relevant pass?
Here is my itinerary :

Kansai International Airport then directly I will go to Hiroshima
J1 Hiroshima
J2 Miyajima
J3 Onomichi / Imabari
J4 à J6 Okayama (Kurashiki, Naoshima / Teshima / Kobe/Himeji)
J7 à J9 Osaka 2n
J9 KoyaSan
J10 to J14 Kyoto
J15 Otsu
J16 to J17 Kawaguchiko 2n
J18 to J20 Tokyo 3n
J21 Nikko
J22 to J24 Tokyo 2n
Haneda Airport

I thought taking the JR Hiroshima pass for the 5 first day then the JR Kansai wide pass for the next 5 days.
For the others days, I would take simple tickets...

What do you think about?

Tha'k you very much for your help.

Sophie