Previous answer is
Hizen Kuni Dewa Kami Yukihiro

Special feature :
Yukihiro was a swordsmith of Hizen province. He is the second son of Hashimoto Yoshinobu. Yukihiro got the title of Dewa Daijo in 1648 and ranked up to Dewa (No) Kami in 1663.He moved to Nagasaki to learn under Hisatsugu and Tanenaga who were skilled to use western steels exported from Dutch.
Later he became a retained swordsmith of the Nabeshima family and lived at Nagase town.He passed away in 1683, aged 66.
This sword looks like Masahiro’s works, we can say this a masterpiece. unlike other swords this sword’s kinsuji appear well. The hamon remind us cumulonimbus cloud in summer sky.
We strongly recommend this awesome sword for you.

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Appraisal Quiz #423 (January 21th, 2017)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

1 : The blade is regualr size width, thickness with deep sori and longer kiissaki  nice looking shape.
2 : Koitame hada well grained with jinie attach and chikei work.
3 : Niedeki middle suguha and notare with thick nioikuchi and double hamon.  In Ha, sunagashi and kinsuji work. Boshi is round shape with thick nioikuchi.

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