What is the name of Sana's neigborhood, district, or ward that she lives in "Kodocha"?

I'm writing a Ranma/Kodocha fanfic and I'm planning putting Ranma in a new school that is in Sana's school distsrict. My problem is that I do not know where it is. All I know is that Sana goes to Jinbo Elementary School and she'll be going to Jinbo Middle School soon.