I'm afraid so. If you were looking for more information, you're right in thinking you're probably better off looking for any temples they might have had.

[ But that's a good question. ]

Sadly, I can't say. I haven't been visiting neighbors as much as I should, admittedly. But despite that, there should be some temples in the Near Shore you and Tsukiyomi may have had. That could point you in the right direction.