YOKOYAMA SUKESADA LINEAGE A Bizen Katana in Unusual Mounts Momoyama (1573-1615) or Edo (1615-1868) period, 17th century Of honzukuri, iorimune, chū-gissaki configuration with a shallow toriizori curvature forged in ko-itame hada and chōji and gunome midare tempered edge ending in a midare komi bōshi, the ubu tang with two holes (overlapping and partially plugged), katte sagari file marks and signed Bishū Osafune no jūnin Yokoyama Kozuke Daijō Fujiwara Sukesada, with a one-piece gilt habaki; the