Does anyone know if there are fakes of kadoya in Japan?

I recently bought 4 used kadoya products from different sellers on mercari. They all had thousands of good reviews but I also heard that mercari has a problem with fake products. I got the kadoya pieces for fairly cheap given that they were used, but I’m still nervous that they’re fakes. Could anyone help authenticate them? The attached images has 2 of the items that I’m worried about. Think I may just be a little paranoid because shipping is a lot…