Previous answer is
Mumei (Nio)

Special feature : Swordsmiths of Ni-o school forged sword in Su-o province, present Yamaguchi pref. In the Heian period, Sho-en, the manor in medieval Japan had been developed in Su-o. Many fiefs of the Imperial Household, the Fujiwaras and the Todaiji temple also developed in that period. It is thought that the reason why the sword influenced by Yamato School had been forged there was the result of cultural exchanges between Kinai and Su-o. Kiyotsuna forged the oldest tachi of Ni-o school in1265 with the name of an era, the Bun-ei period that is in the Itsukushima Shrine in Hiroshima pref. next to Yamaguchi pref. Swordsmiths of Ni-o school continued to forge sword in the Shin-to period.

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Appraisal Quiz #539 (May 18th, 2019)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length :　71.8　cm or 28.3 inches.
Sori : 2.0 cm or 0.79 inches.
Mekugi : 　4
Width at the hamachi : 2.23 cm or inches.
Width at the Kissaki : 2.09 cm or inches.
Kasane : 0.45 cm or 0.177 inches.
Shape : The blade is wide and thick with deep sori
nice gorgeous shape. almost Ubu style.
Jigane :Koitame hada and mokume hada mixed
with jinie attach and midare utsuri appear.
Hamon :Nioi deck choji midair hamon up and down with small ashi,
Yo work. In Hamon, there are sunagashi and kinsuji work.
Boshi: Midarekomi and turns back sharply and hakikake style.

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