Miyata Nobukiyo (宮田信清), art name Kakumeisai, was born in Kyoto in Bunka 14 (1817) under the surname Kinoshita. At fifteen he was adopted into the Miyata family, hereditary shrine priests of Kamo Shrine. The following year he entered the school of Gotō Kakujō Mitsuyasu, sixth-generation head of the Gotō Rihee branch, where he received his foundational training in (official-house carving). At twenty-three he traveled to and studied under Gotō Mitsuaki, sixteenth head of the mainline Gotō house, deepening his command of orthodox Gotō technique. He became independent in Tenpō 14 (1843), establishing a workshop at Kayabachō in Nihonbashi, and later served as a retained metalworker to the Nanbu clan. He died in Meiji 17 (1884) at the age of sixty-eight.
Nobukiyo's work is distinguished by its faithful transmission of Gotō-school methods executed with refined precision. His characteristic idiom employs grounds of exceptional density, producing the deep "wet crow-feather" luster prized in superior . Upon these grounds he renders figural and heraldic subjects — dragons and tigers, auspicious creatures, seasonal flower roundels, vine arabesques — in high relief, finished with restrained and occasional accents. His complete ensembles frequently encompass , , , , , and , unified by a single decorative program. The often feature yōbori (modeled carving) on gold grounds, while his range from signed guards to iron-cored leather constructions finished in tomo .
Nobukiyo occupies a distinctive position among late- metalworkers as a practitioner who absorbed roughly a decade of disciplined Gotō-school training and channeled it into complete ensembles of elevated, formal character. His surviving works are comparatively few, making preserved matched sets especially valuable for understanding the full scope of his style. The consistently careful workmanship, dignified compositional planning, and chromatic restraint across his oeuvre exemplify the highest standards of Gotō-lineage metalwork in the closing decades of the period.