Accompanied by an NBTHK Kichō Tōken ("Precious Sword") certificate.
This compact tantō bears the signature Yoshisuke (義助), the name of the founding line of the Shimada school (Shimada-ha), which worked in Shimada in Suruga province (present-day Shimada City, Shizuoka) from the mid-Muromachi period into the mid-Edo period. It is accompanied by a Kichō Tōken ("Precious Sword") certificate issued by the NBTHK (Nihon Bijutsu Tōken Hozon Kyōkai, the Society for the Preservation of Japanese Art Swords), papering the blade as a genuine work worthy of preservation.
Yoshisuke is regarded as the founder and signature smith of the Shimada tradition, a name carried across several generations. By tradition the name was bestowed by the Imagawa, the great daimyō house that governed Suruga: the smith received one character — yoshi (義) — from his patron's name, and signed Yoshisuke thereafter. The school enjoyed the patronage of some of the most powerful warlords of the Warring States era, including the Imagawa, Takeda, Hōjō and Yūki, and Yoshisuke is celebrated above all as the maker of the Otegine, one of the "Three Great Spears of Japan." The Shimada smiths were prized makers of tantō, short wakizashi and spears in particular.
Stylistically, Shimada work is built on the Mino tradition but is strongly colored by the Sōshū (Sagami) tradition — the lively, energetic style of hardening for which the school is most loved — with touches of Bizen as well. It is this pronounced Sōshū character that gives a blade like this its appeal.
Forged in hira-zukuri with no curvature (mu-sori) and a notably thick kasane, the blade has a solid, purposeful feel in the hand despite its small size. The jigane is a tightly forged itame grain with areas of mokume mixed in, well covered in ji-nie — the fine, glittering crystalline activity over the surface of the steel that is a hallmark of Sōshū-influenced work. The hamon is an undulating pattern with a soft, misty nioiguchi, mixed with bold, large gunome, and enlivened by activity within the hardened edge — rounded tama (isolated bright spots) and ashi (feet of hardening reaching toward the cutting edge). The blade is in sound, healthy condition (kenzen) — free of fatal flaws and entirely suitable for appreciation as it is.
The signature survives in the form of an orikaeshi-mei — a "folded-back signature." When an older, longer blade is shortened (suriage) to alter its length or balance, the lower portion of the tang carrying the smith's name would normally be cut away and lost forever, leaving the blade unsigned (mumei). The orikaeshi-mei is the rarer and more painstaking alternative: the signed strip of the original tang is thinned and folded back onto the shortened nakago so that the maker's name is carried over onto the reshaped blade.
It is an uncommon feature, and a telling one. A craftsman only goes to this trouble for a blade considered worth preserving by name — so the orikaeshi-mei is itself evidence of the regard in which this tantō was held. Together with the two mekugi-ana, it records a working life long enough to see the blade reshaped and re-fitted, while its identity as a Yoshisuke was deliberately kept intact.
The blade is housed in a plain wood shirasaya, the traditional resting mount that protects the steel between viewings.
A characterful, hand-sized antique blade carrying a preserved signature, an NBTHK certificate, and the lively Sōshū-influenced workmanship of the Shimada school — an approachable yet historically rich entry point for the collector drawn to Muromachi-period nihontō.
The quality of the blade and the simplicity of the shirasaya mount truly reflect traditional Japanese mastery. A beautiful and meaningful addition to my collection.
The natural wood finish and clean design highlight the beauty of the blade perfectly. Exactly what I was looking for.
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