Hizen Yukihiro Daisho wtih NBTHK Paper

Hizen Yukihiro was born in 1617 and was named Kurobei. He is the younger brother by 11 years to Shodai Hizen Masahiro, and his grandfather by way of adoption of his father Yoshinobu, is Shodai Hizen Tadayoshi.
His first work is known to have been made in 1639 at the age of 23. His first title, Dewa no Daijo came at age 32 around the time when he began experimenting with oranda tetsu (Holland steel and Dutch manufacturing techniques) under the swordsmiths Hisatsugu and Tanenaga in Nagasaki. In 1663, he was granted a promotion to Dewa no Kami, and two years after this his elder brother Masahiro passed away.

This swordsmith signed in many interesting ways, rarely dating his swords. After achieving the Kami title, he sometimes utilizes the Ichi character. Though the reasons for this are speculated, there does exist a piece signed Hizen Ichi-mon-ji, so it is thought that he studied and practiced some of the techniques related to this school, and perhaps signifies when they are used with the Ichi character.
Continuing in this manner of "coded" signature items, he is known to sign katana with tachi-mei similar to the other members of the Hizen school, but signed wakizashi with katana-mei (i.e. sashi-omote). As well, the "Hishu" style of signature is something he exclusively used to identify his wakizashi and naginata works. After gaining the title of Dewa no Kami, he sometimes remarked on his swords 以真疑作 (motte shin-gitae tsukuru*), indicating that they were "made in the orthodox style." This may be an indication of his ongoing experimentation and utilization of foreign methods and materials as his normal mode of operation.
At the end of his career, he was serving under Nabeshima Sakyo in the town of Nagase, and his own death came in 1683 at the age of 66.

Yukihiro is ranked as wazamono for a high degree of sharpness in his swords and Fujishiro rates him at Jo-saku for a high degree of quality in his work. He is also rated highly at 550 man yen in the Toko Taikan.