Masamune Okazaki, also known as Goro Nyudo Masamune (Priest Goro Masamune), is widely recognized as Japan's greatest swordsmith. As no exact dates are known for Masamune's life, he has reached an almost legendary status. It is generally agreed that he made most of his swords in the early-to-mid 1300s, 1288 - 1328. He created swords, known as katana in Japanese and daggers called tant?, in the Soshu tradition. He is believed to have lived and worked in the Sagami Province. An award for swordsmiths exists called the Masamune prize which is awarded at the Japanese Sword Making Competition. Although not awarded every year it is presented to a swordsmith who has created an exceptional work.
and if someone pipes in with plasma, no plasma isn't better than laser, it can't penetrate as deep, it deviates, the deeper the steel sheet is, laser cuts straight and true, the laser makes a thinner cut, there's also far less waste left over.
(The Big Bang, the nuclear fusion in stars, and supernovas create most of the elements on the periodic table. We're filling it up for them. Even if our elements are a tad bit unstable and keep falling apart...)