Since there were many people related to Iwami in Shimane, I chose Iwami's voice actor. <img src="https://storage.googleapis.com/oshinoko-5xfoy/oshinoko-5xfoy/admin-console-images/1733827553722_e4d07543-d152-4888-8ab5-681adf6cace2.png" alt="" height="28" width="28" fetchpriority="high" class="mx-2 mt-2 inline-block align-bottom">
From "Otter's Lie"<img src="https://storage.googleapis.com/oshinoko-5xfoy/oshinoko-5xfoy/admin-console-images/1733827899825_3e76782c-4bfd-4caf-ae39-3de9eee724cb.png" alt="" height="28" width="28" fetchpriority="high" class="mx-2 mt-2 inline-block align-bottom">
I don't even know what I'm talking about when it comes to the Yamaguchi bridge, but I feel like the Okayama Momotaro one is a good guess!!

Children of the 47 Prefectures (Random Observations) Chugoku and Shikoku Edition | Ripley's post