Accompanied by a certificate of registration as a Tokubetsu Kicho Token [Especially Valuable Sword], no.362857, issued by the Nippon Bijutsu Token Hozon Kyokai [Society for the Preservation of the Japanese Art Sword], on 21st October 1978
Nagasone Kotetsu is universally regarded as the greatest of the shinto period swordsmiths.The Nagasone group of armour and metal horse equipment makers went to Echizen from Nagasone in Omi Province sometime probably in the late 16th century. Kotestu went to Edo and turned to sword making around the middle of the 17th century, when he was around fifty years old, and worked until around 1678. It is thought that he was taught the craft by Izumi no kami Kaneshige (see lot 232). Kotetsu became the most influential of the smiths working in Edo during his lifetime, and several smiths emulated his characteristic hamon, including the so-called 'juzuba', a form of gunome resembling a row of rosary beads. He had a close relation with the most influential people in the sword world, like the Hon'ami sword appraiser family, the polisher Kiya, and Yamano Kanjuro the sword tester. This is a fine example of his suguha work.