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Kantei keys
- Tradition. Bizen-den, that of the smiths of Osafune.
- Hamon. On the katana in the photos, an irregular temper (乱れ, midare) along the blade.
- Horimono. The same katana bears grooves and carvings on both sides.
- Nakago and mei. On one side, the signature with the title Kaga no Suke; on the other, a chrysanthemum (菊紋, kikumon) and the character 一 (ichi).
The sources consulted contain no description of the jihada or the bōshi of his blades.
His signature
The title of a video by Nagano Teruo transcribes the signature of an 1841 katana by Sukenaga: (菊紋)一 山陽道備前国長船郷 鍛冶正統横山加賀介藤原朝臣祐永 ((kikumon) ichi, San'yōdō Bizen no kuni Osafune-gō, kaji seitō Yokoyama Kaga no Suke Fujiwara no Ason Sukenaga), that is, the chrysanthemum and the “one”, the region and the province, and “smith of the legitimate line”.