I asked them this question directly at one of the Bonsaiathon shows (I believe in 2016) and was told that over 80% of their product line was at that time made in the US, and they were working to get to 100%. Their background is in CAD/CAM and they started out making aftermarket parts for the auto industry before the pivot to bonsai tools.
Our vision is to have a 100% American-made bonsai product line - our mindset is, if we can do it here in the USA, that's what we do. Any process that we must internationally source is thoroughly vetted to abide by our high standards.