I don't know the name of this shrine, but the entrance is next to the Okamachi bus stop, so maybe the name is Okamachi Shrine. It looks like a small underused shrine. Maybe it is used for seasonal neighborhood festivals. It was another safe place to visit, with no other people around.
Update: Thanks to Queenie, who researched the name of this shrine - Kami Shimiu Hachiman gu. Thank you!