Here's a couple of screencaps, featuring a common element, an implement shaped like a fish:

I'm wondering what it is and how it works. Curiously enough, there were about four sets with a hearth in Moribito, and not one had anything like that.

UPDATE: Aroduc told me that it's called "jizaikagi". He also mentioned that jizaikagi is not always carved like a fish. Armed with that information, I found it in Moribito:

The hook rope goes up through a channel near one end of jizaikagi, loops through the ceiling attachment, and terminates at the other end. This way, the height of the hook above the fire can be adjusted easily.

UPDATE 20150101: Katanagatari 01 also has a basic wooden beam without adourments: