Among the five schools of the Yamato-den, Senjuin (千手院) is held to be the earliest in origin, its name drawn from the Senjudo, a hall enshrining Senju Kannon (the Thousand-Armed Avalokitesvara) said to have stood at the western foothills of Mt. Wakakusa in Nara. The smiths who gathered in that quarter, working under the patronage and within the orbit of the great temples, formed the group, and their close association with the warrior-monks of the monastic establishments is thought to account for the scarcity of signed work that marks the school across its whole span. Old transmitted writings name two masters of the late Heian period, Yukinobu and Shigehiro, though no secure example by either has been confirmed; the oldest surviving signed piece is a tachi cut with the three-character inscription "Senjuin," placed in the early Kamakura period. Blades prefixed Ko-Senjuin are assigned to the earliest phase and retain the lingering presence of the straight-sword (chokuto) tradition, material indispensable to the study of how the curved shinogi-zukuri blade took form. Production runs from the late Heian period through the Nanbokucho era. The school's vocabulary is rooted firmly in Yamato practice. The jigane is an itame mixed with mokume and passages of nagare-masame, often tending toward hada-dachi, with thick ji-nie adhering well, abundant chikei, and in finer examples a faint nie-utsuri that leaves the steel bright and clear; the masame gathers and strengthens toward the edge on the most Yamato of the blades. The hamon is fundamentally a suguha with a shallow notare tendency, mixing ko-choji, ko-gunome, and ko-midare, the habuchi fraying into hotsure with uchi-noke, nijuba, kuichigai-ba, and yubashiri worked in profusion; thick ko-nie lies along a clear nioiguchi, while kinsuji and sunagashi run vigorously through the ji and ha. The boshi enters straight and forms a ko-maru with vigorous hakikake, or finishes in yakizume.
Within this shared foundation the hands diverge. Yoshihiro is singled out as the smith whose ji and ha vary most, his nie especially strong, swelling from the school's quiet suguha into a flamboyant large midare with kinsuji and sunagashi that reads toward Soshu. Sukemitsu gathers ko-choji, ko-gunome, and small midare on a bright suguha-cho, a Bizen-leaning admixture set against the school's plainer temper, his bold two-character mei itself a mark of the hand. Nobuyoshi of the Ryumon group, a Yamato branch, divides between a lively midare carrying utsuri and a Bizen character and a subdued suguha fraying into hotsure in which the Yamato color stands strongest. To kantei a Senjuin blade is to read its position among its neighbours, and the long-standing rule holds that within the Yamato Five Schools a hamon of unusually vigorous and changeable character should be appraised as Senjuin, against the more restrained tempers of Tegai, Shikkake, Taima, and Hosho. The masame in the ha, the hotsure, kuichigai-ba, and nijuba, and the yakizume or hakikake boshi keep the work within Yamato, while the brightness of the nioiguchi and the ko-midare on the edge set it apart from the plainer suguha of its sister schools. Surviving forms span tachi, katana, kodachi, ken, and yari, the ken notably numerous because they served as goshintai and ritual implements rather than weapons of the warrior class; many blades keep their ubu nakago, with pronounced koshizori and funbari of archaic bearing. Yoshihiro's dated signatures give him a face among many anonymous hands, his manner the touchstone for Soshu-tinged mumei attributions; Nobuyoshi is carried to high standing by a single great signed tachi held as an imperial heritage; Sukemitsu is anchored by a dated reference tachi in the Tokyo National Museum. The bulk of the school's record is mumei, the attributions resting on construction, the flowing masame-inclined forging, and the bright suguha alone, and provenance runs through religious institutions such as Tanzan Shrine and Kyoo Gokoku-ji (To-ji), attesting to the school's monastic roots. Learn more →
