A katana inscribed Nōshū Seki-jū Teruhiro and dated the ninth month of Tenshō 17 is the document around which the history of this smith has been rewritten. Higo no Kami Fujiwara Teruhiro is the founder of the Aki Teruhiro line of Hiroshima. The published sources record the transmitted account: a native of Mino said to descend from Seki Kanetsune, he first signed Kanetomo, studied under Umetada Myōju, entered the service of Fukushima Masanori, changed his name to Teruhiro and received the title Higo no Kami, and followed his lord to Kiyosu in Owari and then, in Keichō 5, to Hiroshima in Geishū. The Tenshō katana shows that he already signed Teruhiro while still in Mino, and the published sources conclude that he had "already reached maturity before entering Myōju's school"[[c:1]]. The teaching relationship with Myōju, they write, now needs fresh examination and is "left to future research"[[c:2]].
His surviving work is exceedingly scarce. The earliest papers judge that it does "not exceed ten fingers even counting katana, tantō and naginata together"[[c:3]], and later papers repeatedly give "fewer than twenty pieces"[[c:4]], counting katana, tantō, yari and naginata. Within that small record the long weapons predominate. The published sources note that "among them, naginata survive from time to time"[[c:5]], and the yari include a great ōmi-yari of a shaku and a half, of which they write that "a large spear reaching a shaku and five sun is rare, and the workmanship is also excellent"[[c:6]].
The Tenshō katana sets the measure of his hand. It is somewhat wide, with little taper, a strong sakizori and an ō-kissaki. The jigane is an itame mixed with nagare-hada, taking masame toward the edge and standing somewhat in hada-dachi, with ji-nie. The hamon is notare-based and boxes up in places into large patterns, with gunome-chōji-like elements, tobiyaki and muneyaki, ashi and yō, deep nie, kinsuji and sunagashi. The published sources call it "an outstanding blade of the first-generation Teruhiro showing a bold style"[[c:7]], "overflowing with presence together with its wide body and ō-kissaki"[[c:8]]. The Higo no Kami katana designated at the very first session is read in another key, as a work "that admired the Shizu style, one of the fine pieces among his works"[[c:9]]. Its flowing itame runs toward masame and is zanguri, and its ko-notare with gunome is crossed with sunagashi.
On the naginata the itame flows, often toward masame, and stands in places, with ji-nie. The hamon is a ko-notare or notare mixed with gunome, small gunome and pointed elements, with ashi, yō and sunagashi, the nioiguchi sometimes tight and sometimes settling into shizumi. One is singled out as the work "showing the most spirited style among his works"[[c:10]], another as "a work that does not shame the name of a master smith"[[c:11]]. The yari are forged in masame or a flowing grain and tempered in a suguha-toned shallow notare with small gunome, the nioiguchi bright. A few wide, elongated hira-zukuri tantō and wakizashi stand apart. Of one tantō the published sources write that it "shows no trace at all of having studied under Umetada Myōju"[[c:12]], showing instead the Owari Seki manner of its day while being well made, and of a hira-wakizashi that it "shows the Seki manner and is well made"[[c:13]].
Two features run through the whole record. His bōshi enters midare and finishes pointed, often turning back long, far more often than on the blades of his son-in-law, whose bōshi runs mostly straight to a ko-maru. And the published sources name a deep nioi only once for him, where it is the constant of the second generation's ko-notare. That son-in-law, an Owari man of the Kanie family, became Harima no Kami Teruhiro, and the published sources set the two titles side by side: "the first generation received Higo no Kami, and the second received Harima no Kami"[[c:14]]. After the Fukushima house was dispossessed the line served the Asano daimyō, and "the descendants served the Asano family and have prospered in this place for generations"[[c:15]].
Fujishiro grades him Jō-jō saku. Seventeen designated works are on record: the Tenshō katana, first designated Jūyō and later raised to Tokubetsu Jūyō, a prewar Jūyō Bijutsuhin katana, and Jūyō naginata, yari, tantō, wakizashi and katana. For a collector the long weapons are the realistic encounter: a naginata or yari by his hand comes to light from time to time, while a signed katana, of which so few survive, is a rare event. The Tenshō katana itself is a landmark of early Shintō scholarship, a single blade that changed how the founder of a Hiroshima house is understood.