Famous smiths, period by period

How to read a list of smiths

• Signed or unsigned. A blade with a signature is zaimei (在銘); without one, mumei (無銘). Most Kamakura and Nanbokuchō blades lost their signature when the tang was shortened to fit later mountings.
• Attributions. Unsigned work is attributed by style, and the paper says so carefully: "den" (伝, "said to be") or the school name when the individual hand cannot be reached.
• Cut attributions. Appraisers of the Hon’ami family added their verdict to the tang in inlaid gold (kinzōgan-mei) or red lacquer (shu-mei). That is an old attribution, not a signature.
• False signatures. For the most famous names, a false signature (gimei, 偽銘) is more common than a genuine one. A signature is always judged together with the style of the blade, never on its own.
• Generations. The workshop name is inherited: shodai (初代) is the first generation, nidai (二代) the second, and the hands differ. "Kanemoto" or "Sukesada" stand for dozens of smiths.
• Nicknames. Kotetsu, Nosada, Magoroku and Tōshirō are common bynames, not what the tang says.
• Dates. "Active in the X era" comes from surviving dated work, not from a register. Biographies before the Edo period are reconstructions, and the dates of Heian smiths are largely tradition.

Heian and early Kamakura

Smith	School and province	Activity	Why he matters	Traits and reference work
Sanjō Munechika (三条宗近)	Sanjō · Yamashiro	Mid-Heian; tradition places him in the Eien era (987–989)	His "Mikazuki" tachi is a National Treasure and one of the five celebrated swords (tenka-goken). He signed "Sanjō" or "Munechika"	A slender sugata with the curve concentrated near the tang (koshizori) and fine ko-midare in nioi; his National Treasure «Mikazuki Munechika» is held at the Tokyo National Museum.
Yasutsuna (安綱)	Hōki	Heian	Maker of the "Dōjigiri", a National Treasure and usually placed first among the tenka-goken; a relatively large number of his works survive	Dark, highly active steel, a suguha-chō hamon in nioi with coarse nie; his National Treasure «Dōjigiri Yasutsuna» is at the Tokyo National Museum (fig.).
Tomonari (友成)	Ko-Bizen	Late Heian; tradition of the Eien era	Held, with Sukenari, to be the founder of Ko-Bizen and the first great name of the province that forged the most swords	A slender blade with pronounced koshizori, fine itame with chikei and small ko-chōji; his works are held at the Tokyo National Museum and at Kasuga Taisha shrine.
Masatsune (正恒)	Ko-Bizen	Late Heian; tradition of the Chōtoku era (995–999)	A contemporary of Tomonari; with him he sets the Ko-Bizen pattern: slender blade, shallow curvature, ko-chōji in nioi	The same Ko-Bizen pattern as Tomonari, with fine-line ko-chōji in nioi; one of his tachi, with its complete nashiji-lacquer mounting, is held at the Tokyo National Museum (fig.).
Kanehira (包平)	Ko-Bizen	Late Heian	The "Ō-Kanehira", a National Treasure, is among the most celebrated blades in Japan; one of the "three Hira" of Bizen with Sukehira and Takahira	A blade unusually wide and robust for Ko-Bizen, with lively chōji-midare and long ashi; his National Treasure «Ō-Kanehira» is held at the Tokyo National Museum.

Mid and late Kamakura

Smith	School and province	Activity	Why he matters	Traits and reference work
Awataguchi Kuniyoshi (粟田口国吉)	Awataguchi · Yamashiro	Mid-13th c.	One of the great tantō makers; father or teacher of Yoshimitsu	Elegant tantō with fine ko-nie in suguha or suguha-chō; his works designated Jūyō Bunkazai are held in Japanese collections.
Awataguchi Yoshimitsu (吉光), "Tōshirō"	Awataguchi · Yamashiro	Works dated in Kenji and Kōan (1275–1288); active around the Shōō era (1288–1293)	The foremost tantō specialist of the kotō and the last master of the Awataguchi; with Masamune and Gō Yoshihiro he forms the tenka-sansaku	Tantō with no sori or a slight uchizori, an extremely refined ji in ko-itame, suguha in fine nie; his National Treasure «Atsu Tōshirō» is held at the Tokyo National Museum (fig.).
Rai Kunitoshi (来国俊)	Rai · Yamashiro	Dated signatures from 1279 to 1321; one of 1315 adds "made at the age of 75"	A career of more than fifty years and abundant work; whether the two-character "Niji Kunitoshi" is him or an earlier smith is still debated	Tight itame with jifu, suguha or suguha-midare in fine nie with kinsuji; abundant work spread across Japanese museums and collections.
Mitsutada (光忠)	Osafune · Bizen	Mid-13th c.; founded the school around 1238	Founder of Osafune, the highest-output school in the whole history of the sword	Tall, showy chōji-midare with deep ashi, o-midare in some pieces; his National Treasure works are held at the Tokyo National Museum and the Nezu Museum.
Nagamitsu (長光)	Osafune · Bizen	Second half of the 13th c.	Son of Mitsutada; numerous and often signed work, the practical benchmark of classical Bizen	Chōji-midare more restrained than his father’s, sometimes suguha; abundant signed work spread across Japanese museums.
Kagemitsu (景光)	Osafune · Bizen	From the Kagen era (1303–1306) to Kenmu (1334–1336)	Son of Nagamitsu; he perfects kataochi-gunome, the "slanting shoulder" hamon that gives his hand away	Kataochi-gunome, the «slanting-shoulder» hamon he himself invented, over tight itame; his National Treasure works are held at the Tokyo National Museum.
Shintōgo Kunimitsu (新藤五国光)	Sōshū · Sagami	Late 13th – early 14th c.	The first recognisable exponent of the Sōshū and teacher of Masamune's generation; his tantō are among the finest of the period	Compact-sugata tantō, suguha in bright nie with chikei; his tantō are among the finest pieces of the period, held in Japanese museums and collections.

Nanbokuchō

Smith	School and province	Activity	Why he matters	Traits and reference work
Masamune (正宗)	Sōshū · Sagami	c. 1264–1343; work placed between 1288 and 1328	The most famous name in the craft. He signed very little, so nearly everything attributed to him is mumei; his technical contribution is large, bright nie	Large, bright nie, abundant chikei, highly active hada: Sōshū-den at its most refined; his National Treasure «Hyūga Masamune» is held at the Mitsui Memorial Museum (fig.).
Sadamune (貞宗)	Sōshū · Sagami	First half of the 14th c.	Adopted son or pupil of Masamune; his unsigned work is attributed by style and counts as the purest continuation of the master	Continues Masamune’s large nie with a calmer touch, suguha-notare in nie; unsigned work attributed by style, spread across Japanese museums and collections.
Gō Yoshihiro (郷義弘)	Etchū	Mid-14th c.	The third of the tenka-sansaku; he died young and no signed blade by his hand is known	Hada so refined it borders on muji, with no visible grain, and deep nie; no signed blade of his is known, all are attributed by style.
Norishige (則重)	Etchū	First half of the 14th c.	The most striking steel of the period: matsukawa-hada, "pine bark", in great swirls of chikei	Matsukawa-hada in great swirls of chikei, coarse nie; scarce and highly valued work, in Japanese museums and collections.
Kaneuji (兼氏)	Shizu · Mino	First half of the 14th c.	A smith of the Yamato Tegai school who studied the Sōshū method and founded the Mino tradition; his blades are called Yamato-Shizu	Transplants Sōshū hada to Mino: itame with chikei, notare in nie; his Yamato-Shizu blades are the hinge between the two traditions.
Kanemitsu (兼光)	Osafune · Bizen	c. 1328–1360	Son of Kagemitsu; he moves from his father's orderly hamon to the broad notare of the Nanbokuchō and is among the most highly regarded Bizen smiths of the period	Broad notare inherited from the Nanbokuchō, itame with utsuri; abundant, signed work, the benchmark of late Bizen.
Chōgi (長義)	Osafune · Bizen	Mid-14th c.	Head of Sōden-Bizen, the Bizen that takes up the devices of the Sōshū	Wide notare mixed with gunome, occasional hitatsura: Sōshū devices on a Bizen base; head of the Sōden-Bizen.

Muromachi and the Sengoku

With the wars of the sixteenth century demand explodes and the serial weapon appears — the kazu-uchi-mono — alongside quality commissions. The names of this age are at once personal signatures and workshop brands.

Smith	School and province	Activity	Why he matters	Traits and reference work
Kanemoto (兼元), "Magoroku"	Seki · Mino	2nd generation, Eishō (1504–1521) and Daiei (1521–1528) eras	He fixes the sanbon-sugi, the "three cedars"; his work has a reputation for cutting and heads the wazamono grades	Sanbon-sugi, the regular «three-cedar» peaked hamon that identifies him unambiguously; abundant work, heading the top wazamono grade.
Kanesada (兼定), "Nosada"	Seki · Mino	2nd generation, first half of the 16th c.	He received the title of Izumi no Kami, very rare for a smith; the stroke with which he writes the character 定 gives him his byname	Regular gunome-midare with wide nioi; the particular stroke with which he cuts the character 定 in his signature is an authentication trait.
Muramasa (村正)	Kuwana · Ise	First decades of the 16th c.; two or three generations	Blades feared for their cut and aggressive in style. In the Edo period they became an anti-Tokugawa symbol and literature gave them a curse	Aggressive hamon, irregular gunome-midare and sometimes hako-midare, on a robust sugata; one of his blades, an Important Art Object, in a 1933 photograph (fig.).
Sukesada (祐定)	Osafune · Bizen	16th c.	The most repeated signature of Sue-Bizen, used by many hands: a commission by Yosōzaemon Sukesada and a serial weapon with the same name have nothing in common	The steel varies a great deal by hand; commissions by Yosōzaemon Sukesada, of higher quality and care, are clearly distinct from serial production under the same name.

Shintō (1596 – 1781)

Smith	Centre	Dates	Why he matters	Traits and reference work
Umetada Myōju (埋忠明寿)	Kyoto	1558–1631	Regarded as the father of shintō; he worked in the Nishijin quarter and was also a first-rate carver and maker of sword guards	Refined suguha in nie, plus highly elaborate horimono of his own; he is credited with fixing the modern kantei practice of the chiselled signature.
Horikawa Kunihiro (堀川国広)	Kyoto	Keichō era (1596–1615)	A samurai in the service of the Itō of Hyūga until the house fell in 1577; he forged as an itinerant and founded, in the Horikawa quarter, the school of Kunimichi, Kunisada and Kunisuke	Robust sugata transitional between kotō and shintō, notare-gunome in coarse nie; his work as an itinerant smith is scarce and much sought after.
Hizen Tadayoshi I (肥前忠吉)	Saga · Hizen	1572–1632	Sent by the Nabeshima to study under Myōju in 1596, aged twenty-five; he founds the longest-lived school of the shintō. From 1624 he signs Musashi Daijō Tadahiro	Konuka-hada, an extremely fine grain «like rice bran» unique to the school, under narrow suguha in nioi; one of his blades, Tokubetsu Jūyō, in a real photograph (fig.).
Yasutsugu (康継)	Echizen and Edo	First half of the 17th c.	Smith to the Tokugawa: he uses the character 康 from Ieyasu's name and cuts the family's hollyhock crest. Famous for reworking blades burnt in fires and for using imported iron	Uses imported iron (nanban-tetsu) in part of his output, suguha or notare; he cuts the Tokugawa hollyhock crest on pieces commissioned directly by the family.
Nagasone Kotetsu (長曽祢虎徹)	Edo	Died 1678; settled in Edo around 1656	An Echizen armourer who turned to blades after fifty. His juzu-ba, "rosary beads", and his reputation for cutting have made him the most forged name in shintō	Juzu-ba, the «rosary-bead» hamon of regular rounded peaks; one of his blades, with the Yamada family’s cutting inscription, is held at the Tokyo Fuji Art Museum (fig.).
Tsuda Echizen no Kami Sukehiro (津田越前守助広)	Ōsaka	1637–1682; titled Echizen no Kami in 1658	Inventor of the tōran-ba, the "breaking waves" hamon that everyone after him copied	Tōran-ba, the «breaking-waves» hamon he invented, with wide, luminous nioi; work much imitated after him.
Inoue Shinkai (井上真改)	Ōsaka	1630–1682	Son of Izumi no Kami Kunisada; called "the Masamune of Ōsaka" for his steel and his suguha in nie. He worked alongside Sukehiro	Suguha in fine nie and very clean steel, close to classical Sōshū; scarce work owing to his early death, and highly valued.

Shinshintō and gendaitō

Smith	Centre	Dates	Why he matters	Traits and reference work
Suishinshi Masahide (水心子正秀)	Dewa and Edo	1750–1825	Father of the shinshintō: in the service of the Akimoto house, he preached a return to kotō technique in print and in the workshop and trained the next generation	He first championed the shintō of his own day, then went on to preach a return to kotō; one of his blades, dated 1791, is held at the Boston Museum of Fine Arts (fig.).
Hosokawa Masayoshi (細川正義)	Shimotsuke (Kanuma) and the Tsuyama domain	1786–1858	He entered Suishinshi Masahide’s workshop in 1805 and became, alongside Taikei Naotane, one of his two most distinguished pupils; he sometimes signed «Sakuyō bakkashi Hosokawa Masayoshi».	Bizen-style chōji-midare over tight itame, the best of Masahide’s pupils alongside Naotane; his particular yasurime was copied by his followers.
Chōunsai Tsunatoshi (長運斎綱俊)	Yamagata and Edo	1798–1863	A pupil of Masahide and the best of the group in the Bizen manner, with a very lively chōji-midare	Lively Bizen-style chōji-midare, inherited from Masahide and taken to its most brilliant point among his pupils in that manner.
Taikei Naotane (大慶直胤)	Yamagata and Edo	1778–1857	The most gifted of the school; titled Chikuzen Daijō (1821) and Mino-no-suke (1848). He mastered all five traditions, above all Bizen and Sōshū, and went on travelling to forge past the age of seventy	He mastered all five traditions; one of his daishō, signed in Tenpō 7 (1836), shows his tight itame and the variety of his hamon (fig.).
Minamoto Kiyomaro (源清麿)	Edo	1813–1854	"The Masamune of Yotsuya": scarce output, powerful blades and a violent hamon in nie. He died in 1854, by tradition by his own hand and with orders unfulfilled	Violent hamon in coarse nie over a powerful sugata; one of his daishō, from 1848 and documented on Wikimedia Commons, shows both traits (fig.).
Sa Yukihide (左行秀), «Tōko»	Chikuzen, later Tosa	1813–1885	He claimed descent from the medieval Chikuzen master Samonji; trained in Edo under Shimizu Hisayoshi, in 1856 he became the retained smith of the Yamanouchi clan in Tosa and one of the great names of the Bakumatsu.	Took Inoue Shinkai as his model: a wide, clear nioiguchi laden with ko-nie; he also forged straight, sori-less blades shortly before the Meiji Restoration, some owned by Sakamoto Ryōma and Saigō Takamori.
Gassan Sadakazu (月山貞一)	Ōsaka	1836–1918	He survived the Haitōrei on ceremonial commissions and carving of high quality; in 1906 he was appointed an Imperial Household Artist	He masters ayasugi-hada, the «wave-grain» steel typical of the Gassan school, along with finely detailed carving (horimono).

After 1953 the craft returns under licence. Six smiths have been declared Living National Treasures — holders of an important intangible cultural property: Takahashi Sadatsugu (1955), the first; Miyairi Akihira (1963); Gassan Sadakazu II (1971), the twentieth-century smith and not his nineteenth-century namesake; Sumitani Masamine (1981); Amata Akitsugu and Ōsumi Toshihira (both in 1997). At the NBTHK's annual competition the highest rank is mukansa, "exempt from judging": whoever reaches it shows outside the competition.

The wazamono lists of Yamada Asaemon

Cutting ability was measured and published. The Yamada family, whose heads bore the hereditary name Asaemon, served the shogunate as sword testers and executioners: they cut the bodies of the condemned and recorded the result blade by blade. The two classic lists come out of those tests.

The Kaihō Kenjaku (懐宝剣尺, 1797) was compiled by Tsuge Heisuke Masayoshi, a samurai of the Karatsu domain, from the cutting data of Yamada Asaemon V; it was reissued in 1805 and 1815. The Kokon Kaji Bikō (古今鍛冶備考, 1830) revised and enlarged the classification using the tests of Yamada Asaemon Yoshitoshi, of the seventh generation. The 1797 list spreads 163 smiths across the four grades; the 1830 list, 187.

Grade	1797	1830
Saijō ō-wazamono (最上大業物)	12	15
Ō-wazamono (大業物)	21	21
Yoki wazamono / ryō-wazamono (良業物)	50	58
Wazamono (業物)	80	93

The top grade includes Nagasone Kotetsu and Okimasa, Kanemoto I and Magoroku Kanemoto II of Seki, Tadayoshi I and III of Hizen, Kunikane of Sendai, Motoshige and Hidemitsu of Osafune, Mihara Masaie, Tatara Nagayuki and Miyoshi Nagamichi.

Three cautions. The list measures the edge, not the art: the great Kamakura names barely appear, because blades of that standing were not put to the test. The result also depended on the polish and on the man doing the cutting. And "saijō ō-wazamono" is much used as a label today, so it is worth checking which generation and which line is meant.