$3,000

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About the school

Yoshii School吉井派

The Yoshii school (吉井) took its name from a locality on the Yoshii River in Bizen province, the stretch of country facing Osafune across the water, and it is from that base that the lineage is read in the late Kamakura period, through the Nanbokucho, and on into the Muromachi. Tradition holds that the line began with Tamenori toward the close of the Kamakura age, though pieces reaching that far back are exceedingly rare; the NBTHK separates the older tier, of Nanbokucho date and before, as *Ko-Yoshii*, reserving the plain name Yoshii for the full Muromachi production. The dated, signed hands by whom the school is most clearly told run from Kagenori and Noritsuna in the fourteenth century, through Morinori and Naganori of the late Nanbokucho into Oei, to Kiyonori in the middle Muromachi, the name passing along a chain of Nori- and Tsugu-cut signatures (Yoshinori, Kiyonori, Naganori his son) that fixes the school to the year across roughly a century and a half. Kagenori, whose lineage-name endured longest and is held by one account to be the main line, anchors the early record; Kiyonori supplies its textbook Muromachi face. What binds the school as a body, and what no other branch of *Bizen-den* shares in the same way, is a single distinctive temper: a small *gunome* (the *ko-gunome* or *ko-choji* the trade calls the "Yoshii-ba") linked in a regular, orderly, repeating run, often with a slight slant or *togari-gokoro* and pointed elements folded into the row. Over this the school raises its second great hallmark, a *midare-utsuri* so particular that the published sources describe the very shape of the hardened edge as though cast straight into the *ji* as a shadow, echoing the outline of the temper rather than drifting as an ordinary Bizen reflection would. The *jigane* is a tight, standing *ko-itame* mixed with *mokume*, at times taking an *ayasugi*-like or *masame* tendency that itself reads as a Yoshii tell, with *ji-nie* densely applied and *chikei* entering; the *boshi* follows the temper into the point in *midare-komi*, turning in *ko-maru*. Within this shared vocabulary the generations diverge in degree: the older Ko-Yoshii hands work *nie*-laden, with vigorous *sunagashi* and *kinsuji* that on Kagenori's boldest tachi recall the oldest Bizen, while the Muromachi production is mostly *nioi*-based with modest *ko-nie* and a soft *nioiguchi*. A quieter second register runs throughout the school, a narrow *suguha* carrying only a slight admixture of small *gunome*, the calm half of the same hand; even there it is the folded-in gunome that returns the attribution to Yoshii. The long signatures, cut toward the *mune*, frequently use *saka-tagane*, reverse-driven chisel strokes that mark the very *mei* as the school's own. To *kantei* a Yoshii blade is therefore to read the regular linking first: the orderly, repeating *ko-gunome* and the shadow-cast *utsuri* distinguish it at once from the softer, cloud-like *midare-utsuri* and the broader *choji* of the Osafune mainstream, and the strength of the *nie* on older pieces is what guards against a later confusion with Mino. The school's standing rests less on grand provenance than on this recognizability and on its documentary value, the dated inscriptions making its smiths placeable to the year, which for late Bizen hands is much of the appeal. Among the named members Kagenori and Morinori carry the line at its Ko-Yoshii finest, the Fujishiro appraisers rating Morinori and Naganori at *chu-jo saku*, a step above the school's average run; Kiyonori's best wakizashi is judged to approach the Ko-Yoshii range within a Muromachi frame. Recorded whereabouts scatter across temple, museum, and private hands, a Kagenori tachi in the Sano Art Museum, a Kiyonori tachi at Yasukuni Shrine, a Naganori odachi in the Tokugawa Art Museum, and a Kagenori once appraised as Ko-Bizen passing through the Date family; none rises above the Important Sword tier into National Treasure or Important Cultural Property. A signed, dated Yoshii blade thus remains an attainable way to hold late *Bizen-den* in its most exactly knowable and most immediately recognizable form.

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