After the Ōnin War broke the Ashikaga order, a century of Sengoku warfare armed nearly every province in Japan. The era rewards a discriminating eye: routine work exists in quantity, and beside it stand custom blades of the first rank.
Sankaku-yari. Thin rust scattered throughout. No ha-kobore. Masame-hada. Suguha. 54cm from the kissaki to the nakago. Bo-hi of 14.5cm. Shirasaya total length 105cm.
Offered by Nakano Kosen
We couldn’t find current papers for this piece. Ask the dealer whether it has been, or can be, submitted to shinsa. — Hoshi

As written by the shop
Machine translation from the shop's Japanese · may contain errors ·
The Muromachi period (1392 to 1573)
After the Ōnin War broke the Ashikaga order, a century of Sengoku warfare armed nearly every province in Japan. The era rewards a discriminating eye: routine work exists in quantity, and beside it stand custom blades of the first rank.
We could not find an authenticity certificate on the seller’s listing. Japanese swords and fittings are normally papered by the NBTHK (or the NTHK). Without one, the attribution is the seller’s own assessment and has not been independently verified — treat it with caution and ask the dealer about certification before buying.
¥170,000