Hi,
It think that this blade is from Iga no Kami fujiwara Kinmichi (sandai) Enpo era (1673) to kyoho era (1716), the shodai and nidai have the top (roof) of the kanji kin more open there is also a difference on the kanji kami.
According Mino to book, in 1722 Kinmichi sandai was selected by the shogun Yoshimune to participate in a competition at Hama Goden (imperial residence at Edo); but he was ill, so yondai Rai Kinmichi went in his place. The latter won and as a consequence Izumi no kami Rai Kinmichi became the swordsmith at Edo.
kiku mon turn on the opposite direction than yours ont he oshigata wich i have.