There are some cycling shops nearby as below.
‘GIANT STORE（ONOMICHI U2）’
https://www.onomichi-u2.com/en/giant.html
You can enjoy comfortable cycling with sports bikes including road carbon and road aluminum.
‘BETTER BICYCLES’
https://better-bicycles.com/
You can rent three types of simple and functional bicycles. It is l8 minutes to better bicycle’s office (ONOMICHI SHARE).
closed:Wednesday
‘Onomichi Port(Ekimae-Kowan Car Park)‘
http://www.go-shimanami.jp/global/english/bicycle/
There are many bicycles suitable for walking around town such as light cars and cross bikes.