Katana in Shirasaya (NBTHK 19th Juyo Paper)
Signature:Hizen Koku ju Oumi Daijo Fujiwara Tadahiro
Sayagaki was done by Kanzan sensei:
Hizen Koku Ju Oumi Daijo Fujiwara Tadahiro
Suguha deki Kessyutsu no ichi. 2syaku 3sun 3bu han ari.
The blade was polished.
Blade length : 69.69 cm or 27.43 inches.
Sori : 1.51 cm or 0.59 inches.
Mekugi : 1
Width at the hamachi : 3.30 cm or 1.29 inches.
Width at the Kissaki : 2.38 cm or 0.93 inches.
Kasane : 0.78 cm or 0.30 inches.
Era : Edo period Kanei to Kanbun era.
Shape : The blade is wide(Motohaba 3,3cm) and thick and long kissaki nice looking healthy blade.
Jitetsu : Koitame had well grayed with jinie attach and chikei work wonderful nice Jigane.
Hamon : Niedeki Cyuーsuguha(middle suguha) Notare hamon with thick nioikuchi and sinagashi ,kinsuji work.
Boshi is round shape with thick nioikuchi.
Special feature : Tadahiro the Second forged this katana. He was born Heisakuro Hashimoto as a legitimate son of Tadayoshi the First.
Tadahiro was only19 years old when his father passed away in1632 but he was enough skillful to forge sword at that time.
Tadahiro designated the Omi-Daijo in 1641, aged 29 and continued not only forging sword but also supervised many students until his death in 1693, aged 80.
He is known as a skillful swordsmith almost all works are above the standard hizen-to.
He had been forged sword for a long period of time to leave the largest number of swords among the swordsmiths of Hizen school.
He was good at both of Suguha-hamon and Gunome-midare Hamon.
Especially the beauty of jitetsu called konuka-hada is appreciated as the best among the hizen-to.
His swords are ranked at the Owaza-mono because of the sharpness.
This blade is healthy and nice balanced nice work.
according to the Kanzan sayagaki and Jyuyo token zuhu, this sword is the top ranking sword in his making swords during his life.
The blade is healthy without kizu and flow.
NBTHK 19th Juyo Paper
Aoi Art estimation paper : whole Oshigata.