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About the school

Edo Ishido School江戸石堂派

The Edo Ishido school (江戸石堂) is the capital branch of the Ishido lineage, a body of *shinto*-era smiths who carried the Bizen *choji* tradition into Edo and there pursued a single deliberate project: the revival, in the brighter steel of the early-Edo forges, of the flamboyant *choji-midare* worked by the medieval Fukuoka-Ichimonji masters of Bizen. The school's makers came up from Omi by way of Kyoto rather than directly, the Akasaka-signed blades of Mitsuhira fixing that route, and several of its leading hands trace to the Kyo-Ishido line before the move to the capital; Heki Mitsuhira, eldest son of Yamashiro-no-kami Ippo, and Tsushima-no-kami Tsunemitsu stand as the twin pillars of the early school, while the Edo Ishido Korekazu line carried the house specialty forward, the seventh-generation Korekazu keeping it alive through the nineteenth-century *shinshinto* revival. A separate Edo strand runs through Yamato-no-kami Yasusada, whom recent research and the Shinto Bengi place within the Kishu Ishido group, a Kanbun-era master of the capital whose temper turns toward the angular rather than the *choji* of his school-fellows. What binds the school is a shared vocabulary rather than a single hand. The defining work is the *choji-midare* tempered over a bright *shinto* *ko-itame*, a crowded line mixing *gunome*, *ko-gunome*, round-topped *choji* and small *choji* with angular and pointed elements, the yakiba rising and falling in marked height, the *ashi* and *yo* entering vigorously, the *nioiguchi* clear; on the most successful pieces a *midare-utsuri* stands in the *jigane*, the koto-Bizen reflection raised again on a *shinto* blade, the single feature that carries the Ichimonji comparison furthest. Mitsuhira tempers this revival chiefly in *nioi*, and the NBTHK reads his *choji* over its *utsuri* as the fullest realization of the school's program, a *splendid choji-midare that recalls the old Ichimonji*. Korekazu departs precisely here: where the other Bizen-leaning smiths held their *choji* in *nioi-deki*, he forged the house pattern in *nie-deki*, deep in *nioi* and thick in *nie* over a *ko-itame* approaching a *muji-fu* tightness, with *sunagashi*, *kinsuji* and *nie-suji* threading the edge, a Bizen pattern carried on a *Soshu*-leaning base. Yasusada marks the school's outer divergence, working a *notare* mixed with *gunome* that boxes at peak and valley, the *nioiguchi* inclining to a subdued *shizumi* and a steeply raised *iori-mune* among his marks, his *Soshu*-leaning *nie* temper inherited through Kaneshige. Across all of them the *jigane* is the constant that underwrites the edge, a densely forged *ko-itame*, sometimes mixed with *mokume*, the *ji-nie* laid dust-fine and *chikei* entering well. To *kantei* an Edo Ishido blade is to read a revived Bizen *choji* set on an unmistakably *shinto* ji: the *choji-midare* draws the eye to old Ichimonji, but the steel beneath is the bright, clean forging of the Kanbun and later forges, frequently on the broad body, thick *kasane* and contracted *chu-kissaki* of the era, with Mitsuhira's transitional silhouette retaining a touch of *funbari* and standing *sori*. The *utsuri* when present confirms the school's intent; the choice of *nie-deki* over *nioi-deki* separates Korekazu from his fellows; the boxed *notare* and *shizumi* *nioiguchi* mark out Yasusada, whose hand is read against Kotetsu rather than against his school. The NBTHK ranks the best of these makers among the leading smiths of their respective ages, Mitsuhira as one of the most skilled to represent the Edo Ishido and Korekazu beside Jirotaro Naokatsu and Hosokawa Masayoshi among the late-Edo masters. Provenance is generally quiet, held in private and public hands rather than great houses, though the school's blades carry the texture of their moment: the Yamano gold-inlaid cutting-test inscriptions recur on Yasusada and on Mitsuhira's earliest dated work, one Korekazu blade is held by the Imperial Family, and his *man'yogana* and *joi*-slogan inscriptions voice the late-Edo current that the school's final flowering of *Bizen-den* outlived.

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