Kanenori seems to be a school of smith dating from around 1573. So this thing might date back anywhere from 1990 to 1573. Well at least that narrows it down a little
Origins of the school:
http://www.sho-shin.com/hoku18.htmKANENORI
I wonder if related to this guy:
(2) TEN-SHO (t: SEKI KANENORI, br: SHINPACHI KANENORI):
MINO KANENORI transferred to ECHIGO in the TEN-MON era.
Then accompanied NOBUNAGA's siege of the ASAKURA at
ICHIJO-ga-DANI, from whence his signature:
ICHIJO-ga-DANI JU.
ICHIJO-ga-DANI was the ASAKURA castle of the above
NORIKAGE and handed now to ASAKURA YOSHIKAGE, who had
defied the call against the sitting ASHIKAGA SHOGUN,
YO****ERU by his brother, YOSHIAKI. NOBUNAGA successfully
accepted the task, and afterwards obliged YOSHIKAGE's
appearance to the KYOTO capitol. YOSHIKAGE refused.
Joining with the ASAI, a stand was made and finally
broken on the banks of the ANE-GAWA River. The
intervention of Emperor OGIMACHI gave a temporary
reprieve, but YOSHIKAGE was destined for SEPPUKU in his
family's hall, ICHIJO-ga-DANI Castle, TEN-SHO 1573.
ECHIZEN was given to ODA's vassal, SHIBATA KATSUIYE, but
KANENORI and his following smith line would continue in
ECHIZEN into the SHINTO - spreading to ETCHU, KAGA and
ECHIGO.
He held to his teachers' (MINO KANENORI) SANAMI style,
from MINO NARA KANENAGA: Standing SHIRA-KE ITAME with
MASAME HADA and YAKIBA of KO-NIE GUNOME-MIDARE on NIOI
sweep. MIDARE-BOSHI to JIZO or TOGARI-KAERI.
MEI: ECHIZEN ICHIJO JU KANENORI
ECHIZEN-no-KUNI JU KANENORI
ECHIZEN-no-KUNI JUNIN KANENORI
ECHIZEN ICHIJO-ga-DANI JU KANENORI