NihontoWatchNihontoWatch貞綱
Where Sadatsuna stands among comparable artisans: across all of nihontō, and within tradition, era, and period. The tiers (Foremost · Leading · Major · Notable) weigh official designations from the NBTHK and Japan's Agency for Cultural Affairs, together with historical honors of lasting repute such as the Sansaku and Meibutsu-chō.
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Sadatsuna（貞綱） was a Japanese swordsmith of the Naotsuna school in Iwami province, active during the Oei (1394-1428) period.
The work follows the Soshu-den tradition.
Designated works by Sadatsuna include 2 Jūyō.