Thank you for your answers.
I'm not asking by chance, of course. Yesterday such a camera appeared on German Ebay. It's up for auction and I'll see how the prices develop. But I'm not sure whether this camera would give me any significant advantage at all for my shortest focal lengths. The shortest focal length I use is 90 mm. And I have the impression that my Wista Field DX probably has similar characteristics. Perhaps the bellows of the Tachihara is a little easier to move, but as it looks to me so far, the camera doesn't have that many advantages. It looks like a normal Tachihara, but has shift on the front standard, is not collapsible and has a wide-angle bellows.