These minimalist bottle openers were designed by Nobuho Miya, an expert nambu tekki (cast iron) craftsman. The modern silhouettes designed by Miya is a charming mimicry of the kokeshi doll craft that is prevalent in Iwate prefecture where these openers are also made. Each cast iron opener is finished with an urushi (Japanese lacquer) coat for a rich black that helps the iron stay resistant to rust.  Over time however, you may see the urushi wear off to reveal a silver-brown patina underneath, which is part of its natural beauty.