TOKUBETSU Hozon, Late KAMAKURA period, Ko-Mihara 古三原 Long Naginata Naoshi

Naginata Naoshi Katana from the late Kamakura to Nanbokucho period.
Approximately 700 years ago.
Remnants of a very ancient Naginata can be seen.
Mihara was a swordsmith active at the Bingo School.
Includes a gold habaki cover.

NBTHK Tokubetsu Hozon Shinsa paper.

Signature : Mumei (Ko Mihara)
Nagasa : 656mm (25.83 in.) 
Sori : 20mm (0.79 in.) 
Total length : 930mm (36.61 in.) 
Motohaba : 29.3mm (1.15 in.) 
Sakihaba : 21.1mm (0.83 in.) 
Motokasane : 6.6mm (0.26 in.) 
Sakikasane : 4.6mm (0.18 in.) 
Blade Weight : 622g
Total Weight : 972g