Previous answer is
Hizen Kuni Oumi Daijyo Fujiwara Tadahiro(2nd generation)

Special feature : Tadahiro the Second 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 pupils 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 Choji-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.

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Appraisal Quiz #341 (May 30nd, 2015)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length : 68.18 cm or 26.84 inches.
Sori : 2.25 cm or 0.88 inches.
Mekugi : 3
Width at the hamachi : 2.79 cm or 1.09 inches.
Width at the Kissaki : 2.03 cm or 0.79 inches.
Kasane : 0.56 cm or 0.22 inches.
Shape : The tang remains very close to Ubu(original tang without any cutting).
Jitetsu : Mixture of Ko-Itame Hada and Nashime Hada patterns. The Jitetsu steel is well grained with Jinie attached.
There are some parts where the Hada patterns are a bit too clear(O-Hada), but it would not bother us when appreciating.
Alike the Shinogi-Ji area, the Hamon on the Jigane steel is mixture of Ko-Itame and Mokume Hada pattern.
Hamon : Nie Deki Choji Midare with remarkable Nioiguchi. Soft koashi and Yo works are also impressive.
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