I thought about this as well. The answer I came to is, yes, probably you can put a scanning back on just about anything, and it's not going to be too complicated to make an adapter if one doesn't already exist.
But... (and this is a big but) take a long hard look at the exposure times you're up against with these scan backs. If you're in a studio environment with a rock solid cambo and camera stand, that's one thing. But anything but the best-designed wooden field camera*** may not have the overall stability to deliver the kind of results that you expect based on the resolution capabilities of the back. I think that'd be a really big issue for me. I imagine myself schlepping a 20lb+ rig into the field just for the sake of stability over several seconds of exposure.
Frankly, if I were to invest the time to machine an adapter for a scanning back I would make it very precisely from metal and it would be designed to mate a precisely machined metal camera e.g. my cambo.
So my preliminary diagnosis, so far, is that a scanning back probably isn't compatible with my own idea of a lightweight field camera.
I am looking more seriously at a ZD back now. But I did think about a scan back on an rb67, that might well be beast enough for stable field work.
*** I certainly do not mean to imply inferiority of your Tachihara, I haven't used one myself.