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Documented works
| Work | Designation | Where it is |
|---|---|---|
| Katana by Yosōzaemon-no-jō for 栗山与九郎 (Kuriyama Yokurō), 1521 (Eishō 18) | Important Cultural Property | Chūgoku region; owner not on record |
| Large spear 備州長船祐定 (Bishū Osafune Sukesada), 1504 (Eishō 1) | No designation | Tokyo National Museum (F-15922) |
| Katana by Yosōzaemon-no-jō, 1523 (Daiei 3) | No designation | Tokyo National Museum (F-17086) |
| Three katana by Yosōzaemon-no-jō, from 1533 to 1535 (Tenbun) | No designation | NBTHK Sword Museum, donations |
| Katana 備前国住長船祐定 (Bizen no kuni-jū Osafune Sukesada), 1568 (Eiroku 11) | No designation | Kyoto National Museum (E甲212) |
| Katana by 新捨郎 (Shinsutero) Sukesada, 1572 (Genki 3) | No designation | Tokyo National Museum (F-15820) |
| Katana by Genbei-no-jō, 1577 (Tenshō 5) | No designation | Kyūshū National Museum (F90) |
| Katana by Yokoyama Kōzuke Daijō, 1666 (Kanbun 6), offered to the principal shrine of the province | Cultural property of Okayama Prefecture (2019) | Okayama Prefectural Museum; owned by the Kibitsuhiko shrine |
| Straight sword (剣, ken) signed 祐定 (Sukesada) | Cultural property of Okayama Prefecture (1980) | Kagamiishi shrine, Bizen |
| Katana by Yokoyama Kōzuke Daijō, 1677, in a cane mounting | No designation | Metropolitan Museum, New York |
| Daishō by Yokoyama Kōzuke Daijō, 17th century | No designation | Metropolitan Museum, New York |
| Katana with Fudō Myōō, 16th century | No designation | Walters Art Museum, Baltimore |
Three pieces
The 1521 katana that Yosōzaemon-no-jō made for Kuriyama Yokurō is an Important Cultural Property: the list for the Chūgoku region and the Nihon Jinmei Daijiten confirm it, but its owner is not on record. The large spear of 1504 has a blade of more than 70 cm, with a chōji-midare temper, and was donated by Tokugawa Mochitsugu. Tradition says that Katō Kiyomasa used it and that his daughter Yōrin-in took it as a dowry when she married Tokugawa Yorinobu, of the Kishū house.
The 1666 katana by Yokoyama Kōzuke Daijō has a blade of 120.3 cm and measures 151.7 cm overall, and weighs 1,800 g. Okayama Prefecture counts it among Sukesada’s highest-level works, made with good steel in the Sue-Bizen style.
In the lists
In the Yamada cutting list (懐宝剣尺, Kaihō Kenjaku, 1797), Yosōzaemon Sukesada and Tōshirō Sukesada are in the second grade, that of ō-wazamono (大業物), and according to the Japanese Wikipedia so is Hikobei-no-jō. Yokoyama Sukesada is in the third (良業物, yoki-wazamono), and Shichibei Sukesada, in the mixed category. The English version of the same list puts only Yosōzaemon and Tōshirō in the second grade, and the Japanese Sword Index gives “Osafune Sukesada” as ō-wazamono without distinction. The ō-wazamono cut through the torso seven to eight times out of ten in the tests attributed to Yamada Asaemon V Yoshimutsu.
In the 誌上鑑定 (Shijō Kantei), the kantei competition of the NBTHK journal, from 1998 to 2024, five Sue-Bizen Sukesada blades and one of the Edo period came up. No work of theirs is on record in the Kyōhō meibutsuchō (享保名物帳, Kyōhō meibutsuchō).
Gallery
Large spear (大身槍, ōmi-yari) signed 備州長船祐定 (Bishū Osafune Sukesada), of 1504 (Eishō 1). Tokyo National Museum. Tokyo National Museum, via ColBase · ColBase terms of use · source 
Katana signed 備前国住長船祐定 (Bizen no kuni-jū Osafune Sukesada), of 1568 (Eiroku 11). Kyoto National Museum. Kyoto National Museum, via ColBase · ColBase terms of use · source 
The mounting of the 1523 (Daiei 3) katana by Yosōzaemon-no-jō Sukesada. Tokyo National Museum. Tokyo National Museum, via ColBase · ColBase terms of use · source 
The 1677 katana by Yokoyama Kōzuke Daijō Sukesada, in its cane mounting (shikomizue). The Metropolitan Museum of Art. The Metropolitan Museum of Art, New York · Public domain · source 
The blade of the 1677 katana. The Metropolitan Museum of Art. The Metropolitan Museum of Art, New York · Public domain · source 
Wakizashi by Yokoyama Kōzuke Daijō Sukesada, of the 17th century, with its mounting. The Metropolitan Museum of Art. The Metropolitan Museum of Art, New York · Public domain · source