....
The four sections formed by the "hagi-ita" remindes me of the "shiho jiro" type, despite the absence of shinodare. Likewise the large "tehen" seems to be a reminiscence to older helmets, from the Kamakura period for example...
Hi Nick,
Seve is right!
This smith dates back to the mid Edo period (approximately 1751-1764). He lived in Kôchi in Tosa province and was called "Ôe". It is said that he was a student of 27th generation "Munemasa".
Hope that helps a bit!
John,
as far as I know Asai is a family name. I found Katsumitsu (Asai Jubei, who moved to Kanazawa), Asai Katsushige and this Asai Tomoyuki. Although I don`t know if the sources can be trusted! So we have to find the connection between Hirata and the Asai.
But that is another topic!