Hi officer, i'm planning to buy Kansai Thru Pass but i'm still not sure whether it's really FREE ...

Hi there,

We regret to inform you that the Kansai Thru Pass does not include the Kobe City Loop Bus.
For more information, you can check the train and bus names that are valid with the Kansai Thru Pass.
https://www.surutto.com/tickets/kansai_thru_english01.html

If you are interested in the Kobe city loop bus, I recommended one and two days.
However, you can see more detail at the link below.
https://kobeloop.bus-japan.net/ticket/

You can also purchase digital tickets here.
https://moberss.com/en-US/product/f50add9b-9a4c-498e-94ca-cfaa232c7f71?category=Events

I hope you have a good time in KANSAI. 

You can see the trains and buses that can be used with the KANSAI THRU PASS from the URL below.
https://www.surutto.com/tickets/kansai_thru_english01.html

Kobe city loop bus cannot be boarded with KANSAI THRU PASS.

You need to buy a Kobe city loop bus ticket.
Please refer to the following for ticket details.
https://kobeloop.bus-japan.net/ticket/