A Nanbokuchō Tachi by Nobukuni Among the Kishū Tōshōgū Swords
The successive lords of the Kishū Tokugawa house offered swords to Kishū Tōshōgū over more than two centuries, and the resulting collection ranges across the great schools of Japanese swordmaking. One of these blades is a tachi signed Nobukuni, a name carried by a line of Kyoto smiths active in the Nanbokuchō period of the fourteenth century.
The blade has an edge length of about 71.5 centimeters and a shallow curvature of roughly 0.9 centimeters. Its tang has been shortened. The tempering pattern is an irregular midare rather than a straight line, and a single groove called a bōhi is carved down both faces of the blade, lightening it and giving the surface a clean, channelled line.
The Nobukuni name belongs to the Yamashiro tradition, the swordmaking of the Kyoto region. The smiths of this line are described as descendants of the Ryōkai workshop, which itself grew out of the famous Rai school, so Nobukuni stands several generations downstream from the same Kyoto lineage that produced the Rai Kunitoshi blade also held at this shrine. What set the Nobukuni smiths apart was their absorption of the Sōshū manner of the eastern provinces and their skill in carving the blade itself.
Why the Blade Was Designated
This sword became an Important Cultural Property on 29 August 1950, registered as a single item in the crafts category. Its assigned period is Nanbokuchō, the age of the divided courts.
The Nobukuni name spanned several generations, from the Nanbokuchō period into the mid-Muromachi era, which makes attribution a careful matter. Because no signed blade by the very first Nobukuni is known to survive, scholars now generally treat the second-generation smith as the effective founder of the working line. The founder of the school is counted among the so-called Three Disciples of Sadamune, a recognition that places Nobukuni within the circle that carried the Sōshū tradition into Kyoto alongside the Hasebe smiths. A blade bearing this signature therefore documents a meeting point between two of the five great regional traditions of Japanese steel.
As with the shrine's other dedicated swords, the line of ownership through the Kishū Tokugawa is part of the object's protected significance. The crafts designation safeguards not only the forging but the place the weapon held in a warrior family's devotion to its ancestor.
What to Look For, and Where
Please note that this blade is not on permanent view. The shrine's thirteen dedicated swords are deposited at the Wakayama Prefectural Museum and appear only in occasional special exhibitions. Confirm the exhibition schedule before planning a visit around this particular sword.
The shrine where it belongs rewards the journey regardless. Kishū Tōshōgū, founded in 1621 by Tokugawa Yorinobu to honour his father Ieyasu, rises above Wakanoura Bay at the top of a stone stairway of 108 steps. Its lacquered gongen-zukuri hall, with carvings attributed to Hidari Jingorō and Kanō school paintings, is why the shrine is called the Nikkō of the Kansai. The hall, gate, and several other structures are themselves Important Cultural Properties.
When a Nobukuni blade is on display, the two features to study are the irregular temper line and the carved groove. The wandering midare hamon reflects the Sōshū influence the school is known for, a livelier effect than the calm straight temper of the older Kyoto smiths. The single groove running the length of each face is the kind of blade carving in which the Nobukuni line excelled, and its crisp execution is a quiet measure of the maker's hand.
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Q&A
- Who were the Nobukuni smiths?
- They were a Kyoto-region lineage descended from the Ryōkai and Rai schools, active from the Nanbokuchō period into the Muromachi era, known for absorbing the eastern Sōshū manner and for fine blade carving.
- Can I see this sword at the shrine?
- No. It is deposited at the Wakayama Prefectural Museum and shown only in periodic special exhibitions, so check the museum's calendar in advance.
- What is a bōhi groove for?
- It is a groove carved along the blade that reduces weight and improves balance, and it also became a feature of the blade's appearance. The Nobukuni smiths were noted for their carving skill.
- Why is attribution to a single Nobukuni difficult?
- The name was used by several generations, and no signed work by the very first Nobukuni survives, so the second-generation smith is now generally regarded as the effective founder of the line.
Basic Information
| Name | Tachi, signed Nobukuni |
|---|---|
| Category | Craft (sword) |
| Designation | Important Cultural Property (designated 29 August 1950) |
| Quantity | One |
| Period | Nanbokuchō period |
| Maker | Nobukuni (Yamashiro Province) |
| Dimensions | Edge length approx. 71.5 cm (shortened tang); curvature approx. 0.9 cm; irregular temper line; single groove on both faces |
| Owner | Tōshōgū (Kishū Tōshōgū), Wakayama Prefecture |
| Viewing | Deposited at the Wakayama Prefectural Museum; shown only in occasional special exhibitions |
References
- National Database of Designated Cultural Properties (Agency for Cultural Affairs)
- https://kunishitei.bunka.go.jp/bsys/maindetails/201/6310
- Nobukuni (Touken World swordsmith directory, Japanese)
- https://www.touken-world.jp/sword-artisan-directory/nobukuni/
- Kishū Tōshōgū (Wikipedia, Japanese)
- https://ja.wikipedia.org/wiki/紀州東照宮
Last verified: 2026.06.23