Kansai-Hiroshima Pass

Hi, I'll be getting the Kansai Hiroshima Pass to travel for 5 days in October, from 15th to 19th.
Day 1: Kansai Airport to Shin-Osaka (Haruka), Shin-Osaka to Hiroshima (Shinkansen)
Day 2: Just exploring Hiroshima & Miyajima
Day 3: Hiroshima to Himeji (Shinkansen), Himeji to Tottori (Super Hakuto)
Day 4: Tottori to Kyoto (Super Hakuto)
Day 5: Day trip from Kyoto to Amanohashidate and back (Hashidate x2)

I would like to ask about which trains are included, and also about reserved seats. The website said reserved seats are not included, but other sites say up to 6 reserved seats are included. I understand that there are some trains like the Super Hakuto (Day 3 Himeji to Tottori, Day 4 Tottori to Kyoto) and Hashidate (Kyoto to Amanohashidate and back) that are reserved seats only. Will I be able to book tickets on these trains? Is there an extra charge for booking reserved seats?
Also, for the 2 shinkansen trips ( Day 1 Shin-Osaka to Hiroshima and Day 3 Hiroshima to Himeji), are those also included in the pass? Do I need to reserve seats / pay extra to reserve seats?
I am travelling alone with only a normal sized backpack and if there are non-reserved seating options, I'm ok to use non-reserved seats.

Thanks!