
The Yomiuri has an article (Japanese) about Keith Nobuhira Austin, apparently the only foreigner who was accepted for, and completed, the apprenticeship to become a licensed swordsmith. Austin died in 1997 and the article reports that an exhibition of his work is being held in Sakaki, Nagano Prefecure. Rather than translate the Yomiuri piece, it's easier to link to an English site which tell his story in more detail. It describes how Austin first visited Japan in 1961 to study art but quickly became fascinated by Japanese swords and managed to arrange an introduction to master swordsmith Takahashi Sadatsugu who agreed to take him on. Sadagatsu passed away during Austin's apprenticeship which led to him being accepted by Miyairi Akihira (third from the right in the photo above) who was one of the finest swordsmiths in Japan and the second man to be named a "Living National Treasure". This put Austin in the company of some of the best sword-making talent in Japan and he received his licence in 1968. He returned to America in 1971, set up his own forge in Yuba, California, and started producing his own swords which he successfully presented at the prestigious Shinsakuto Meito sword competition. Although he shared his knowledge freely, he had no children or fully-trained students who could take his name and carry on his tradition when he died. The Yomiuri says that he was a perfectionist and left behind few swords because he was unwilling to inscribe his name on an inferior piece. The article also mentions that after he passed away, his friends and family found an unused airline ticket to Japan in his room.
In a related story, Captain Japan has an interview with sword-polisher Jon Bowhay here.
