Previous answer is Hizenkoku Kawachi Kami Fujiwara Masahiro / Motte shintan Saku-no Kao

Special feature : The blade is 2nd generation Masahiro who was born 4th of Kanei ara and named Hashimoto Yahichiro and after that he named Denjirio Masanaga.
The blade itself continued first generation Masahiro's work which looks like thunder clouds deep nioikuchi.
He made swords for 2nd generation Oumi Daijyo Tadahiro .
This sword is middle suguha with thick nioikuchi which is active feeling.

Hint;

Katana
Blade length : 69.39 cm or 27.31 inches.
Sori : 0.9 cm or 0.35 inches.
Mekugi : 2
Width at the hamachi : 2.80 cm or 1.10 inches.
Width at the Kissaki : 2.22 cm or 0.87 inches.
Kasane : 0.61 cm or 0.24 inches.
Era : Late Kamakura period to Nanbokucho period.
Shape : The blade is Oosuriage mumei (cut shortened) with long kissaki.
Jitetsu : Koitame hada well grained with jinie attach and chikei work like Chirimen hada (wrinkle finish) and black sumihada appear. Utsuri appear on the Ji.
Hamon : Koniedeki suguha tightly with ash and yo and also small kinsuji brightly.
Boshi : Notare sakizume style.

1: Ookissaki (long point).
2 : Jigane (texture) is very nice like Chirimen jigane wrinkle finish. And Sumihada appear.
-Sumihada means clear black colored jigane,
3 : Hamon is suguha tightly with ashi and bright hamon.
4 : Generally Boshi is notare hamon.
5 : Signature is mentioned on the Katana mei.
Most of koto blades cut the signature on the Tachi mei.