Shinobigatana 忍刀, Ninja Sword ,Bushuju Minamoto Masazane 武州住源正真 signed

The swords that were said to be favored by ninjas are called Shinobigatana(忍刀).
They are around 60cm long and are characterized by a straight blade with very little curve.

Edo period.

Signature : Bushuju Minamoto Masazane
Nagasa : 602mm (23.70 in.) 
Sori : 4mm (0.16 in.) 
Total length : 850mm (33.46 in.) 
Motohaba : 28.1mm (1.11 in.) 
Sakihaba : 19.2mm (0.76 in.) 
Motokasane : 6mm (0.24 in.) 
Sakikasane : 4.4mm (0.17 in.) 
Blade Weight : 499g
Total Weight : 820g