Ginnanho-Yari 銀杏穂槍, Monju Kaneshige 文珠包重作 signed, Edo period

The Ginnanho-Yari has an unusual shape.
The Ginnanho-Yari is not intended for stabbing, but rather for striking through armor to inflict impact. Therefore, its tip is deliberately made blunt rather than sharp.

Signature : Monju Kaneshige saku
Nagasa : 91mm (3.58 in.) 
Sori : 0mm (0.0 in.) 
Total length : 660mm (25.98 in.) 
Motohaba : 18.8mm (0.74 in.) 
Sakihaba : 20.3mm (0.80 in.) 
Motokasane : 9.8mm (0.39 in.) 
Sakikasane : 7.5mm (0.30 in.) 
Blade Weight : 103g
Total Weight : 284g