Kantei
Short tantō blade, slightly curved, and its tang with two holes and an engraved signature, on a black background.

Tosa, Kyoto and Edo · end of the Edo · shinshintō

Nankaitarō Tomotaka (南海太郎朝尊)

The theorist swordsmith of Tosa and his lineage, the Morioka: his life in Kyoto and in Edo, his treatises, his works and his sources

Nankaitarō Tomotaka (南海太郎朝尊) was a swordsmith and sword theorist at the end of the Edo period. He was born in Tosa, worked in Kyoto and in Edo and wrote treatises on forging. This monograph is that of his lineage, the Morioka, who stayed in the craft with his son, his nephew, his grandson and his great-grandson.

Kyoto National Museum, via ColBase

1805 or 1806-1865
Birth and death
5 swordsmiths
Generations
3 books
Treatises
On this page
  1. Quick profile
  2. In short

Quick profile

Name
Nankaitarō Tomotaka; his swordsmith’s name is also read 朝尊 (Chōson) AT
Kanji and reading
南海太郎朝尊 (Nankaitarō Tomotaka), as signed on the katana of 1853 in the Kōchi Castle Museum of History HD
Period
End of the Edo period (shinshintō) AT
Province
Tosa (土佐), today Kōchi; he also worked in Kyoto and in Edo AT
School
Founder of his own lineage, from the circle of Suishinshi Masahide (水心子正秀) AT
Master
No sword master is recorded. He began as a saw maker, like his father, and in Kyoto he was an assistant to Iga no Kami Kinmichi (伊賀守金道). PC
Title
No honorary title is recorded PC
Generations
Tomotaka; his son Tomoyoshi (朝良); his nephew Tomokuni (朝国); his grandson Morioka Shōkichi, and his great-grandson, who signed Nankaitarō Masataka AT
Rank
He does not appear in the wazamono lists. Tsuneishi Hideaki judges his work inferior to that of Masahide and Minamoto Kiyomaro. PC
Documented fact and tradition
Documented: the katana of 1853 in the Kōchi Castle museum, the tantō in the Kyoto National Museum, his treatise Shintō meishūroku (新刀銘集録) in the Tokyo National Museum and a naginata of 1863 by his nephew Tomokuni. Tradition: he claimed descent in the 17th generation from Prince Takayoshi (尊良親王, Takayoshi shinnō), son of Emperor Go-Daigo; his early works are signed with the surname Fujiwara. HD

In short

More than for his blades, Tomotaka matters for his ideas: with Suishinshi Masahide he championed the return to the forging of the old swords, taught it across the country and wrote three treatises. His contemporaries placed him beside Masahide as the two pillars of the east and the west. The Kōchi Castle museum holds a katana of his from 1853 with a signature of 83 characters, the longest in its collection according to the museum’s own video. The craft stayed in the Morioka family until the 20th century.

Sections

  1. A Tosa lineage, from Edo to Shōwa Life and times Tosa, Kyoto and Edo, his treatises, his clients and the four generations of the Morioka.
  2. Suguha, ko-itame and long signatures Work and style What his blades show and how he signed.
  3. Museums of Kōchi, Kyoto and Tokyo Famous works His works in museums, his treatise and the swords of his clients.
  4. Kōchi and Sakawa Videos The katana of 1853 explained by its museum, and the site of his workshop.
  5. Bibliography and credits Sources The sources consulted on 5 October 2026, with their link, and the credit for each image.