Previous answer is
Special feature : Inoue Shinkai was active from Kanei 7th period to
Tenna 2nd period Settsu. He was active at Settsu until Tenna 2nd year.
His father was Izunomikami Kunisada. His real name is Inoue Hachirobe Yoshitsugu.
He was a famous sword smith at the time as one of the two greatest authorities
at the time along with Tsuda Echizon no kami Sukehiro.
He was called the Osaka Masamune. While there are many Sukehiro pieces
it was rare to see Shinkai pieces. It is most beloved swords of the sword lovers.
He was allowed to put the chrysanthemum crest on the swords that
he has presented to the court.
He has changed his name to Shinkai at Kanbun 12th year.
Appraisal Quiz #276 (January 31th, 2014)
Who made this sword do you think ?
Hints. ※The picture will be enlarged
Blade length : 69.7 cm or 27.44 inches.
Sori : 1.3 cm or 0.51 inches.
Mekugi : 3
Width at the hamachi : 2.86 cm or 1.12 inches.
Width at the Kissaki : 1.93 cm or 0.75 inches.
Kasane : 0.72 cm or 0.28 inches.
Shape : The blade is oosuriage Mumei(cut shortened) and rather wide and long kissaki(point) nice looking sword.
Jitetsu : Itame hada well grained with jinie attached, and some Oohada of Hadadatsu is appear.
Hamon : Nie deki suguha with koashi, sunagashi and kinsuji.
Boshi is big round shaped with hakikake style.
Answer will be posted at next Appraisal Quiz.
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