NihontoWatchThe uniquely chiseled mei "Ninmyokutsu" is missing from the directories, but the style of this work, featuring a tight jitetsu with a Bizen-den nioi-deki sugu-yaki-dashi accompanied by koshi-biraki gunome hamon in groups of two or three and a boshi that is sugu with kaeru, is characteristic of the Inshu Hamabe school. The swordsmith of this work, Ninmyokutsu, is thought to be a smith related to the same school. In the December 2025 shinsa, it passed Hozon Token with an additional note of Inaba, Shinshinto.
NihontoWatchOffered by Touken Matsumoto
Machine translation from the shop's Japanese · may contain errors ·
The Shinshintō revival
Around 1800 Suishinshi Masahide argued in his writings that the craft must return to the old masters’ methods: the fukkotō revival. His greatest successor Naotane worked convincingly in Bizen and Sōshū manners that had been dead for centuries.
Certifies a genuine blade worth preserving: a signature confirmed correct, or, if unsigned, an era, province, and school that the NBTHK can reliably identify.
The NBTHK (Nihon Bijutsu Tōken Hozon Kyōkai, the Society for the Preservation of Japanese Art Swords) is a public-interest incorporated foundation founded in 1948 and supervised by Japan’s Agency for Cultural Affairs (Bunkachō); it is based at the Japanese Sword Museum in Tokyo. Its expert panels physically examine each submitted work (shinsa) and issue a certificate (kanteishō) ranking it by artistic and historical merit. NBTHK papers are the most widely recognized standard of authentication for Japanese swords and fittings.
NBTHK official siteReturns within 7 days of the item's arrival. Returns are not possible if (1) the item has been altered, or (2) for overseas transactions.