The oldest dated blade to survive under the name Yoshisuke is a inscribed Suruga no ju Yoshisuke , dated the eighth month of Eisho 2 (1505), and from that fixed point the early designated work of the Shimada group of Suruga Province can be read. Yoshisuke is the principal name of that group, a school the published sources place in Suruga and read as strongly marked by the forging of neighboring . The sword directories order the line with care, placing a first generation in the Kosho era, a second around Eisho and Daiei, and the name then continuing in succession down into the period, though the directories disagree among themselves, one of them assigning a Yoshisuke of Tensho to a fourth generation. The four blades on record here gather in the half-century from the Eisho through the Daiei and Tenbun eras, and the fixes their dates by the inscriptions cut into their tangs rather than by the directory chronology, so that the surviving signed and dated pieces become the anchor on which the early history of the name rests.
The hand that most distinguishes Yoshisuke is the one carried on the , where the inheritance the school is known for stands at its clearest. Of the Daiei the published sources write that Yoshisuke received strong influence from workmanship, judging it virtually certain, and the blade bears out the judgment. Over a flowing that stands open in , with adhering and entering, he tempers a mixed pattern that takes in , the kept somewhat tight with and running through it, the activity broken in places into a boxed look where discoloration sets the into . The runs , rounded at the tip with a long return and tempered deep down the in . The form is with , the curvature shallow and the point a large , and the surfaces are carried with skilled , a descending finished in with a relief at the waist of the and a on the . The published sources judge the workmanship of both and good and the carving skilled, and call the blade close in these respects to late work.
The quieter half of him lives on the and the , where the school's own steel is most plainly seen. The there is a tightly forged , areas of mixing in places and a tendency entering toward the , the tone turning somewhat whitish, with forming well. Over that he sets a shallow mixed with on the and a with on the , the Eisho carrying a large with a flavor; the runs deep and adhere well, streams through, and the frays into in places. The is to on most, becoming an on the Eisho piece. The carving carries through this register as well, a set within the and, on one , cut in openwork , with a and and a shobu- on the . Across these smaller blades the manner is consistent and self-evidently the school's, the whitish tight and the deep- temper running from one piece to the next.
The corpus reads, then, as two manners sorted by form rather than by date, the broad -leaning on the one side and the school's and hand on the other, and the dated tangs let the two be held against the directory chronology. Of the Eisho the published sources note that among extant works those bearing an Eisho date are the oldest, and of the Daiei that the date on its tang is extremely valuable, the early history of the Shimada Yoshisuke name being argued from these surviving inscriptions rather than from the generation count the directories propose. The openwork carving draws its own comment, the published sources calling the on the post-Tenbun an unusual thing to find, and the blade is judged good in and and a valuable reference piece. These are the notes the judges return to across the four blades, the dated inscription as the school's particular value and the carving as a mark of its skill.
Within the school Yoshisuke stands as its central name, the hand the published sources reach for when they describe the Shimada group, and the tie is the thread that runs through every designation. His own grounded distinctions are internal to that group, the open standing and the deep and the relief carving that set the close to late work on the one side, the tight whitish and the quiet that mark the on the other. No successor line can be drawn forward through any single hand here, the four signed blades being too thin a corpus for that, but the name itself continues through several generations of Shimada smiths down into the period, and the published sources value these early pieces precisely as material for the study of that descent, the Daiei and Eisho tangs called extremely valuable because the chronology of the early generations rests on them.
On the matter of acquirability the record is modest and clear. Yoshisuke holds no National Treasures and no Important Cultural Properties; the four blades on record are all , signed and dated where the tang allows, and none carries a recorded or a named institutional holder. They sit, that is, in the tradeable tier rather than in the patrimony that never moves, which makes a Shimada Yoshisuke a comparatively attainable thing among designated swords, less a landmark to be waited for than a well-made blade of good workmanship that comes to a collector from time to time. What recommends one is what the published sources recommend in them, the dated tang that anchors the school's chronology, the skilled and carving, and the late- character of the better , each piece valued as reference material for a group whose early history is read off these very blades. For the collector who wants a documented example of the Suruga school at the point where the influence is plainest, the early Shimada Yoshisuke is among the more approachable of the named hands.
