源清麿 Smith
Minamoto Kiyomaro is the great romantic figure of late Shinshintō, celebrated in his own short life and ever since as the “Yotsuya Masamune,” the smith whose Sōshū-revival blades reached a power and brilliance unmatched in the nineteenth century. For precisely that reason he is also among the most forged names in all of nihonto. The two facts are inseparable. A brief mature output, very high prices, and a fame that outran his lifetime together produced a flood of false signatures both in his own era and after. A Kiyomaro mei should therefore raise scrutiny rather than settle it. The name asks for more proof, not less.
History and lineage
Kiyomaro was born Yamaura Kuranosuke — also called Tamaki — in the village of Akaiwa in Shinano Province in 1813. His first teacher was his elder brother, Yamaura Saneo (also read Masao), and his earliest serious work was signed Masayuki (正行). This is the most common point of confusion about him: Masayuki was Kiyomaro’s own early signature, not his brother’s name. He changed it himself, to Kiyomaro (清麿), in 1846 — the moment at which his reputation, built working in the Yotsuya district of Edo, crystallised into the legend of the “Yotsuya Masamune.” His life was turbulent and ultimately tragic; a lifelong heavy drinker, he died by suicide in 1854, bringing a mature career of barely eight years to an abrupt close. His most important students were Saitō Kiyondo and Kurihara Nobuhide, both accomplished smiths who carried the style forward. He belongs to the same broad revival current as Suishinshi Masahide and Taikei Naotane, though where they looked widely across the classical traditions, Kiyomaro committed himself most fully to the Sōshū idiom.
Identifying characteristics
Kiyomaro’s work is a powerful, unmistakable Sōshū revival. The jihada is a standing itame, sometimes opening into ō-itame, with thick ji-nie and abundant chikei coursing through the steel. His hamon ranges from a quieter ko-chōji to his most admired manner — a vigorous gunome-midare and bold ō-gunome worked in thick, partly coarse ara-nie. Long kinsuji and sunagashi run through nearly every blade, lending the temper its characteristic restless brilliance. The sugata is robust and confident, frequently with an extended kissaki that gives his katana their assertive, almost theatrical presence. The overall impression is of controlled force — the steel is active, bright, and emphatic in a way that distinguishes genuine work from the many imitations that merely copy its outward shapes.
Why this matters for collectors
There is no gentle way to state the central caution: Kiyomaro is among the most forged smiths in the entire tradition. The reasons compound one another. His mature output spanned only about eight years, surviving genuine blades are few, prices are very high, and period gimei (false signatures) are abundant. A signature alone proves nothing here. The workmanship must carry the attribution. The standing itame with its chikei, the thick ara-nie, and the long kinsuji and sunagashi of the hamon are far more telling than any mei, and to a trained eye they are difficult to counterfeit convincingly. The practical rule admits no exception: no Kiyomaro without modern NBTHK papers. The nakago and its signature must be read by recognised authority against the genuine standard, and the steel must be allowed to speak for itself. Collectors drawn to this Sōshū-revival aesthetic will find its roots in the Sōshū tradition itself, and its broader nineteenth-century context in the work of Suishinshi Masahide and Taikei Naotane. Those interested in another celebrated and heavily forged name might also consider Nagasone Kotetsu.
If you’re considering a blade attributed to Kiyomaro, we welcome enquiries, and we would always counsel patience and proper papers before any commitment.
