kansai - Hiroshima is very worth it, if you want to explore from Osaka to Hiroshima. This pass also covers the ferry to Miyajima and the train to amanohashidate.
This pass can also be used for Shinkanzen nozomi and Mizuho (for jr pas all japan there is an additional fee)
For redemption is very easy, can be exchanged at kansai airport
To get the maximum experience using this jr pass, it is recommended that the day before you get enough rest and visit different cities during the 5 days.