Tsuneto (恒遠) is recorded in the as ", two characters, before Genryaku," placing him in the late to early period as a smith of the group. Judging from the workmanship of his and , as well as the manner of cutting his signature, it is readily accepted that he belongs to the Masatsune (正恒) lineage. His works are exceedingly rare, and signed by Tsuneto represent some of the scarcest survivals among smiths. One example is held in the Imperial Collection (), further attesting to the esteem in which his craft has been held.
Tsuneto's forging exhibits with a slight tendency and somewhat standing grain, upon which adheres and stands out prominently. His typically mixes and with frequent and , accompanied by and well-attached . The often shows an tendency characteristic of early work. In certain examples, however, the broadens considerably and incorporates large , resulting in a flamboyant and brilliant workmanship that departs from the narrow, restrained temperament more commonly associated with smiths. The is typically rendered in or with a slight tendency, and when are present they take the form of carved kaki-nagashi.
Tsuneto's surviving oeuvre constitutes valuable reference material for understanding the stylistic range within the tradition during the transitional period from late into early . His works convey an archaic and elegant flavor while demonstrating that the Masatsune lineage was capable of both restrained -based compositions and more vigorous interpretations. That both and in his extant blades remain speaks to the soundness of his forging, and each signed example holds exceptionally high documentary value given the rarity of his authenticated corpus.