Hello,
We have the Doi family name among our relatives.
I checked my tree but did not see the names you mentioned, however who knows, we could be related. I have not uploaded to Ancestry.com
The Hiroshima village is more likely Hiura Mura, in Asa-gun which is also a part of my family's history. If you can send off a letter to the authorities there, you might find the information you are looking for.
Good luck!
Sumi Matsuura Grossman
SumiGrossman@aol.com