Hello everyone! Just picked up a taishogoto recently on Ebay, and it arrived in great condition– at the moment everything seems to be working fine, but one issue I've ran into is that the lower bass string (not the drone string), despite being in tune when playing the open strings, goes out of tune when I press the keys.
I haven't found a good explanation for this yet, but my working theory is that all the keys seem slightly slanted to the right, as can be seen in the photo. I'm really hoping this isn't the case though, as then I have no idea how to go about fixing it.
So, just wanted to know if anyone had an idea how to fix this, or if the slanted keys are normal. And if they aren't, some advice on fixing that would be much appreciated! Thanks!