Tachi Signed "Sanenaga": A Bizen Blade of the Osafune Line
Kishu Toshogu, the brilliantly colored shrine above Wakanoura bay in Wakayama City, holds a set of swords given by the lords of the Kii branch of the Tokugawa house. One of them is a tachi whose tang is signed simply "Sanenaga." The name points to one of the great workshops of Japanese sword-making: Osafune, in Bizen Province, the busiest sword town the country ever produced. Sanenaga is generally identified as the Osafune master of that name, counted among the foremost smiths of the line alongside Nagamitsu and Kagemitsu.
The blade keeps its original tang, never shortened, and measures about 70.7 centimeters with a curve of roughly 2.0 centimeters. Its temper is a straight line broken by rounded gunome waves, a quieter pattern than the showy clove temper of some Bizen work, and one that rewards close looking. A signed, full-length tachi of this age is an uncommon survivor, and its restraint is part of its character.
A Gift from the Third Lord of Kii
The provenance of this tachi sets it apart from several of its companions at the shrine. Where the Kunitoki and Kageyori blades came from the eighth shogun Yoshimune in 1721, this Sanenaga was dedicated by Tokugawa Tsunanori, the third daimyo of the Kii domain. The donor's identity is reflected in the dress of the sword: the mounting carries the Tokugawa hollyhock crest, the family badge that marks it as a Tokugawa offering rather than an older heirloom.
That mounting is an itomaki tachi koshirae of Edo-period work, its hilt and scabbard bound in purple silk, the scabbard finished in nashiji, a "pear-skin" sprinkled-gold lacquer, with fittings of shakudo, the blue-black copper-gold alloy prized for sword furniture. The blade was confirmed as an Important Cultural Property on 29 August 1950, and the mounting is registered together with it.
How and When to See It
The shrine owns the Sanenaga tachi, but like the rest of Kishu Toshogu's dedicated swords it is held in trust at the Wakayama Prefectural Museum, where the climate and security suit a fragile national treasure. The full set was reunited for a 2024 special exhibition of the shrine's treasured blades, the first such gathering in decades.
One timing point needs flagging. The Wakayama Prefectural Museum is closed for renovation and is scheduled to reopen on 31 July 2026, so the deposited swords cannot be seen there during the closure. Special exhibitions are the realistic way to view this tachi, so watch the museum's schedule once it reopens. The shrine itself stays open: climb the 108-step Samurai Slope to the carved and gilded main hall of 1621, a minute on foot from the Gongen-mae bus stop and a short ride from central Wakayama.
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- Find tours, activities & transport passes near Tachi (inscribed "Masanaga")
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Questions and Answers
- Who was Sanenaga?
- A swordsmith of the Osafune workshop in Bizen Province. The maker of this blade is generally identified with that Sanenaga, who is ranked among the leading Osafune masters together with Nagamitsu and Kagemitsu.
- What does the blade look like?
- It runs about 70.7 centimeters with an unaltered tang and a curve near 2.0 centimeters. The temper is a straight line interrupted by rounded gunome waves, a restrained pattern typical of the smith.
- Who gave it to the shrine?
- Tokugawa Tsunanori, the third daimyo of the Kii domain. Its mounting bears the Tokugawa hollyhock crest, distinguishing it from the swords given by the eighth shogun Yoshimune in 1721.
- Can I see it now?
- Not at present. It is deposited at the Wakayama Prefectural Museum, which is closed for renovation until 31 July 2026. It appears in special exhibitions, so check the museum's schedule after it reopens.
- What is there to see at the shrine?
- The 1621 main hall with its carvings and Kano- and Tosa-school paintings, the vermilion gate, and the bay view from atop the 108-step Samurai Slope. The shrine is reachable by bus from central Wakayama.
Basic Information
| Name | Tachi, signed Sanenaga (with accompanying itomaki-tachi mounting) |
|---|---|
| Category | Important Cultural Property (crafts); designated 29 August 1950 |
| Count | One blade |
| Period / Smith | Kamakura period; Sanenaga of Bizen Province, of the Osafune line |
| Dimensions | Length about 70.7 cm (unaltered tang); curvature about 2.0 cm; straight temper with gunome |
| Owner | Kishu Toshogu, Wakanoura, Wakayama City |
| Custody / Access | Deposited at the Wakayama Prefectural Museum (closed for renovation; reopening 31 July 2026); shown in special exhibitions |
References
- Database of National Cultural Properties (Agency for Cultural Affairs)
- https://kunishitei.bunka.go.jp/bsys/maindetails/201/6304
- Wakayama Prefectural Museum, special exhibition "Treasured Swords of Kishu Toshogu"
- https://hakubutu.wakayama.jp/exhibit/toushougu-houtou2024/
- Kishu Toshogu official site
- https://www.kishutoshogu.org/
Last verified: 2026.06.23