A KOTŌ KATANA IN MOUNTS Muromachi period (1333-1573), 15th/16th century Honzukuri, iorimune, chu-gissaki, toriizori forged in running itame hada with a notare and gunome tempered edge and ko-maru bōshi, chiseled with bōhi on both sides, the ō-suriage tang with four holes and indistinct file marks, with a two-piece gold-foil habaki; the 19th-century koshira-e comprising a black-lacquer ishime saya mounted with a brass kojiri, the tsuka wrapped in black silk and mounted with shakudō fuchi-gashira