Kantei
A low building of dark wood with a light wooden gate and a sacred rope over the entrance.

Forge of Kyōtango (Kyoto) · company of three swordsmiths

Nihon Genshōsha (日本玄承社)

A company of three young swordsmiths founded in 2019, with a forge in Kyōtango (Kyoto) since 2021: who they are, how they work, their work, their NBTHK prizes and their sources

Nihon Genshōsha is not a person but a joint-stock company (株式会社, kabushiki-gaisha) of three swordsmiths born between 1986 and 1990, founded in 2019 and with a forge in Kyōtango, in the north of Kyoto Prefecture, since 2021. Of the three, the one with the most NBTHK prizes is Miyagi Tomoyuki (宮城朋幸).

Photo: the smith himself

3
Swordsmiths in the company
2019
The company is incorporated
2021
Year the forge moves to Kyōtango (Kyoto)
2
Prizes of excellence for Miyagi Tomoyuki at the NBTHK (2020 and 2021)
On this page
  1. Quick profile
  2. In short

Quick profile

Name
Nihon Genshōsha, joint-stock company of swordsmiths AT
Kanji and reading
日本玄承社 (Nihon Genshōsha) AT
Founded
27 March 2019; the 玄承社 (Genshōsha) group was formed in Tokyo in 2017 AT
Forge
Kyōtango (Kyoto Prefecture), since 2021 AT
Swordsmiths
黒本知輝 (probable reading: Kuromoto Tomoki), 山副公輔 (Yamazoe Kōsuke) and 宮城朋幸 (Miyagi Tomoyuki) AT
Master
吉原義人 (Yoshihara Yoshindo), at least Kuromoto Tomoki’s AT
Swordsmith’s licence
Kuromoto Tomoki, 2017; that of the other two is not on record AT
Rank
Miyagi Tomoyuki, NBTHK 優秀賞一席 (Yūshūshō isseki) in 2020 HD

In short

What we know. The NBTHK lists and catalogues give Miyagi Tomoyuki two prizes of excellence (2020 and 2021) and a selection in 2026, and in 2021 his wakizashi already bears the signature 玄承 (Genshō). The history of the company, its dates and its swordsmiths are told by the company itself.

What we do not know. Whether all three trained with Yoshihara Yoshindo, as a municipal notice that is no longer online says, and the work of Yamazoe Kōsuke, who does not appear in any catalogue consulted.

Sections

  1. From Tokyo to Kyōtango History and forging The 2017 group, the 2019 company, its three swordsmiths and the Kyōtango forge.
  2. Swords, demonstrations and “Aratashi” Work and style Their signatures, their way of making the sword known and a gallery of the forge and of the work.
  3. Those of its swordsmiths at the NBTHK Prizes The prizes of Miyagi Tomoyuki and of his colleague in the NBTHK competition, from 2018 to 2026.
  4. Bibliography and credits Sources The sources consulted on 4 October 2026 and the credit of each image.