Miyajima is famous for the sweet called Momiji- Manjyu. The pancake like cake filled with Anko (sweet bean paste) is the basic. but there are various flavors. There are a lot of shops that sells momiji- manjyu, so why don’t you try many kind of fillings from some deifferent shops.
koshian (sweet bean paste without bean skin)
Tubuan (sweet bean paste with whole beans)
Maccha (green tea)