Hira Sankaku Yari

Hello there, I hope you may be able to assist me. I am trying to read an iscription on the nakago of my Yari, can you possibly help? I have uploaded four images of the spearhead. Any ideas what dates / period these relate to?

Thanks,
ANDREA

AttachmentSize
yari_5.jpg472.25 KB
yari_1.jpg307.39 KB
yari_3.jpg462.61 KB
yari_sankaku_4.jpg443.86 KB

Nobuyoshi

The signature is "Nobuyoshi".

Pete

Hira Sankaku Yari

Thank you Pete.