Previous answer is
Minamoto Saemon no jo Nobukuni

Special feature : The founder of the Nobukuni started from Nanbokucyo period.
Nobukuni school continued to several generation.
This sword is belongs to 2nd generation. The blade is nice Jigane with utsuri and hamon.
The blade is Zokumyo Nobukuni Saemon Jyo Nobukuni which is very rear and precious.
It is very hard to look for such kind of sword.

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Appraisal Quiz #260 (September 20, 2013)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length : 71.7 cm or 28.22 inches.
Sori : 1.6 cm or 0.62 inches.
Mekugi : 1
Width at the hamachi :2.97 cm or 1.16 inches.
Width at the Kissaki : 2.11 cm or 0.83 inches.
Kasane : 0.7 cm or0.27 inches.
Shape : The blade is wide and thick with deep sori and longer kissaki nice looking shape.
Jitetsu :Koitame had well grained with jinie attach clear nice Jigane.
Hamon : Niedeki gunome midair with deep nioikuchi and
in Ha, there are many sunagashi and also long kinsuji work.
Boshi is midarekomi style with long kinsuji.

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