As a newcomer to sword collecting who was excited to purchase my first katana, I was shocked to discover that a katana being sold as authentic is actually a fake with altered inscriptions and papers.   The katana in question is currently listed on Catawiki, and the store selling it is Kyodai Originals: https://kyodaiorigin...k-tokubetsu-hozon-2/.   However, the katana and its NBTHK Tokubetsu Hozon certificate have been tampered with. Here’s the evidence: 1. The gold insc