The name "Oda" was taken from Japanese shogun Oda Nobunaga.
The Art of The Evil Within reveals a plethora of background information on Joseph. However, none of this information is mentioned in the game and is thus mostly likely not considered canon.
He is married with one daughter.
He is from Toronto and is a second-generation Japanese Canadian.
His glasses are a keepsake from his grandfather.
There is something special about his glasses.
For breakfast he eats buttered toast with nori.
He only speaks a little Japanese.
In the art book, he does not appear to have a handwritten signature. Instead, he uses the Oda (織田) seal.
The Haunted Joseph Oda boss fight is very similar to the Puppet Cybil Bennett boss fight in Silent Hill 1, in which both are possessed, mutated cops that try to kill the protagonist in which their main attack is firing their gun at the player, so other words another inspiration from the Silent Hill Series alongside the Keeper.