On this page
Sources
NBTHK lists and catalogues
- NBTHK, results of the 2026 現代刀職展 (Gendai Tōshokuten) and list of mukansa
- NBTHK, English catalogue of the 2026 現代刀職展 (Gendai Tōshokuten)
- NBTHK, catalogue of the 2025 現代刀職展 (Gendai Tōshokuten)
- NBTHK, catalogue of the 2024 現代刀職展 (Gendai Tōshokuten) (he does not appear)
- NBTHK, results of the 2023 現代刀職展 (Gendai Tōshokuten)
- NBTHK, catalogue of the 2022 現代刀職展 (Gendai Tōshokuten)
- NBTHK, list of prize-winners for 2021
- NBTHK, catalogue of the 2021 現代刀職展 (Gendai Tōshokuten)
- NBTHK, results for 2019
- NBTHK, catalogue of the 2018 現代刀職展 (Gendai Tōshokuten) (no public address found)
- NBTHK, catalogue of the 新作名刀展 (Shinsaku Meitōten) of fiscal year 2017, exhibited in 2018
- NBTHK, catalogue of the 平成の名刀・名工展 (Heisei no Meitō Meikōten)
- NBTHK, prize-winners of the 令和の名刀・名工展 (Reiwa no Meitō Meikōten)
Other sources
- Zen Nihon Tōshōkai (全日本刀匠会): results of the 14th omamori-gatana exhibition, Japanese Sword Day in Kyūshū (2018) and the Sasebo talk (2024)
- The videos in this monograph, with the channel and date of each one, in “Videos”
Image credits
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Kokuten looks at a blade in his forge (kokuten-retrato-hoja.jpg)
Photo: dealer in Japan.
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He heats the blade in the pine-charcoal hearth to harden it (2020) (m2photo-2020-fragua.jpg)
Author: m2photoMovie, 宮田昌彦 (probable reading: Miyata Masahiko). Rights: © m2photoMovie, 宮田昌彦 (probable reading: Miyata Masahiko).
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The hearth lit for forging, in April 2026 (x-2026-04-28-kitae.jpg)
Photo: the smith himself.
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The tsuchioki (土置き): the hardening clay, applied by hand (2020) (m2photo-2020-tsuchioki.jpg)
Author: m2photoMovie, 宮田昌彦 (probable reading: Miyata Masahiko). Rights: © m2photoMovie, 宮田昌彦 (probable reading: Miyata Masahiko).
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The yaki-ire (焼き入れ), seen through the glass of the tank: the blade curves as it cools (2020) (m2photo-2020-temple.jpg)
Author: m2photoMovie, 宮田昌彦 (probable reading: Miyata Masahiko). Rights: © m2photoMovie, 宮田昌彦 (probable reading: Miyata Masahiko).
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The tachi of the 2025 Kanzanshō (寒山賞), 72.4 cm, at the Japanese Sword Museum (kanzan-2025-tachi-entero.jpg)
Author: 永野照男 (probable reading: Nagano Teruo). Rights: © 永野照男 (probable reading: Nagano Teruo).
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The hamon of the 2025 tachi: chōji (丁子) with tall peaks (kanzan-2025-tachi-hamon.jpg)
Author: 永野照男 (probable reading: Nagano Teruo). Rights: © 永野照男 (probable reading: Nagano Teruo).
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The tachi of the 2023 Kunzanshō (薫山賞), 76.2 cm (kunzan-2023-tachi-entero.jpg)
Author: 永野照男 (probable reading: Nagano Teruo). Rights: © 永野照男 (probable reading: Nagano Teruo).
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The tachi of the 2026 Yūshūshō niseki (優秀賞二席), 77.3 cm (yushu-2026-tachi-entero.jpg)
Author: NIHONTOU. Rights: © NIHONTOU.
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The 2026 tachi: chōji hamon, a groove and an engraving on the blade (yushu-2026-horimono.jpg)
Author: NIHONTOU. Rights: © NIHONTOU.
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The tang of the 2026 tachi, with the signature (yushu-2026-nakago.jpg)
Author: NIHONTOU. Rights: © NIHONTOU.
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The card of the 2025 tachi: his NBTHK record and his comment (kanzan-2025-historial.jpg)
Author: 永野照男 (probable reading: Nagano Teruo). Rights: © 永野照男 (probable reading: Nagano Teruo).
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The card of the 2023 tachi, signed 國天 (Kokuten) (kunzan-2023-ficha.jpg)
Author: 永野照男 (probable reading: Nagano Teruo). Rights: © 永野照男 (probable reading: Nagano Teruo).
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The card of the 2026 tachi: 三池住小宮國天作之 (Miike-jū Komiya Kokuten kore o tsukuru), 77.3 cm (yushu-2026-ficha.jpg)
Author: NIHONTOU. Rights: © NIHONTOU.
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The NBTHK letter informing him of the 2026 Yūshūshō niseki (x-2026-04-16-carta-nbthk.jpg)
Photo: the smith himself.