Kantei
Old black-and-white photo: above, a whole curved tachi; below, two details of the base of the blade with engravings.

Swordsmith of Bungo · late Heian and early Kamakura

Bungo Yukihira (豊後行平)

A smith of Bungo, on Kyūshū, between the end of the Heian and the start of the Kamakura period, the earliest known to have engraved horimono on curved blades: his times, his work, his famous works and his sources

Bungo Yukihira (豊後行平, Bungo Yukihira) forged in Bungo province, on Kyūshū, between the end of the Heian period and the start of the Kamakura. He is the earliest smith known to have engraved horimono (彫物, horimono) on curved blades, and one of his tachi, the Kokin Denju no Tachi, is a National Treasure.

Cultural Properties Association (文化財協会, Bunkazai Kyōkai), 1952, public domain, via Wikimedia Commons

1205
One of his tachi bears the date Genkyū 2
1951
National Treasure: the Kokin Denju no Tachi
4
Important Cultural Properties in the State database
On this page
  1. Quick profile
  2. In short

Quick profile

Name
Yukihira, known by his province as Bungo Yukihira HD
Kanji and reading
豊後行平 (Bungo Yukihira); signature 豊後国行平作 (Bungo Koku Yukihira saku) HD
Nickname
“Kishin Taiu”, according to the English translation of the NBTHK’s Sword Journal; it is not his signature, and its spelling in kanji has not been checked AT
Period
Late Heian and early Kamakura; one tachi is dated 1205 HD
Province
Bungo (豊後, Bungo), today Ōita prefecture, on Kyūshū HD
School
Early Kyūshū; Markus Sesko counts him among the Ko-Kyūshū and Ko-Naminohira smiths of the early Kamakura AT
Master
No document; he is said to have been the master or the pupil of 定秀 (Sadahide, Jōshū), a monk and smith of Mount Hiko, in Buzen AT
Documented fact and tradition
Documented: his signed blades, the date of 1205 and his designations. Tradition: that he was a monk or an ascetic, and his link with Sadahide. AT

In short

What we know. His blades are signed 豊後国行平作 (Bungo Koku Yukihira saku), almost always with engravings at the base: kurikara, bonji, Jizō or cherry blossoms. One tachi bears the date 1205; another, the Kokin Denju no Tachi, has been a National Treasure since 1951, and the State database records four more as Important Cultural Properties.

How we know it. From the blades themselves, described by the NBTHK, the Tokyo National Museum and the records of the Agency for Cultural Affairs.

What we do not know. Nothing of his life is documented: not his master, not whether he was a monk, not when he was born or died.

Sections

  1. Bungo · 1205 · Sadahide Life and times What fixes his period, what tradition tells and what has no source.
  2. Early Kyūshū · suguha · horimono Work and style The kantei keys of his tachi and his engravings, and what they are confused with.
  3. National Treasure · Important Cultural Properties · meibutsu Famous works The Kokin Denju no Tachi, his blades designated by the State and the Jizō Yukihira of the Kyōhō meibutsuchō.
  4. Bibliography and credits Sources The sources consulted on 4 October 2026, with their links, and the credit for each image.