Is there a bus from Nagasaki to Miyajima?

We would be traveling for 6 days. Will arrive Fukuoka, go directly to Nagasaki, plan to have Nagasaki direct to Miyajima, then Hiroshima back Fukuoka.

Miyajima is an island. There's no bus that can take you there directly. You'll need to take a night bus from Nagasaki station to Hiroshima bus centre (8.5 hours ride).

From Hiroshima Bus Centre, transfer to the Kenchomae station on the Astram line to Yokogawa station. From Yokogawa station, transfer to the JR line to Miyajimaguchi station. From there, you'll need to take a short ferry ride to Miyajima (about 10 minutes).

Alternatively, once you've reached Hiroshima bus centre, walk out of the building, go down the escalator (exit), and walk to Kamiyacho Nishi tram stop. That will take you straight to Miyajima station. Then take the ferry from there to Miyajima.

Sorry, you'll have to change frongeto the JR line at Shin Hakushima station, not Yokogawa.

Murakami Seirin, thank you very much, appreciate it. Where will we reserve a night bus? How much will it cost approximately?
Thank you once again for the big help =)

I am unable to find direct buses from Nagasaki to Hiroshima, I think there isn't any, you will need a transfer in Fukuoka.

http://nnt1.web.fc2.com/bus/kosoku-hiroshima.html

Here's the bus. The website is only in Japanese. You can book online, make a call or book at the ticket window. It's \6600 one way.

※この会社は、架空の会社です。

Ah, my bad. Sorry, seems that you'll have to make a transit in Fukuoka afterall.

Thank you very much, appreciate the inputs =)