Han-tachi Koshirae: Structure, History, and Surviving Examples of This Court-Style Ceremonial Sword Mounting

What is hansatachi koshirae — Etymology and Classification

Hansatachi koshirae (半太刀拵え) is a type of sword mounting (koshirae) that takes an intermediate form between tachi koshirae and uchigatana koshirae. The name "hansatachi" refers to not a complete "tachi koshirae," but an appearance that incorporates some of its elements—literally "half-tachi-like" in character. More precisely, it is understood as a form in which both the practice of haiyo (wearing with the blade facing downward suspended from the belt) and the practice of carrying a uchigatana coexist, or as "a sword mounting that approaches tachi koshirae as formal wear while also being designed for use as a uchigatana."

This form of mounting is believed to have been established from the Muromachi period through the Azuchi-Momoyama period, and was used as formal wear by kuge (nobility) and high-ranking samurai. Whereas pure tachi koshirae is positioned as full dress for ceremonies and religious rites, hansatachi koshirae has the character of "semi-formal wear" intended for more everyday official occasions—audiences with the shogun, ritual processions, important events of daimyo households. This balance between practicality and formality may have aligned well with the social needs of the time.

Structural Characteristics — Differences from tachi koshirae

To understand the structure of hansatachi koshirae, one must first know the basics of pure tachi koshirae. Tachi koshirae is a form in which the blade is housed in a sheath (saya), metal fittings called "ashikanamono" are attached to the sheath, and the sheath is suspended from the waist belt through a "sageo" passed through them (haiyo). The handle (tsuka) is shaped to be easy to grip even with the blade facing downward, and the curve is based on the tachi-specific "koshizori."

In hansatachi koshirae, while modifications are made to elements of tachi koshirae—particularly the sheath shape, ashikanamono, and treatment of the sageo—the blade itself can be housed in a structure that accommodates either a uchigatana or a tachi. The sheath follows the form of a tachi sheath but indicates the level of "semi-formal wear" by reducing the number of fittings and lowering the grade of sheath lacquering somewhat. The handle, like tachi koshirae, is long and slender, and the tsukamaki (handle wrapping) is often of refined quality using silk thread or white thread. The tsuba is frequently a large piece with elaborate openwork or high relief carving, and there is a tendency to emphasize decorative beauty.

The Relationship between Kuge Culture and hansatachi koshirae

Hansatachi koshirae held special significance in kuge society because the kuge tradition of sword-wearing differed from that of the samurai. Even in the Muromachi through Edo periods, when samurai came to regularly use uchigatana koshirae emphasizing practicality, kuge continued to observe the ancient practice of tachi haiyo in their service to the Emperor and retired emperors and in religious rites at shrines and temples.

However, constantly wearing pure tachi koshirae was burdensome both physically and economically, so hansatachi koshirae, which could "easily create a tachi-like formal appearance," was highly valued. Particularly when men of the Sekkanke (regent families) such as the Konoe and Kujo families, and the Seigake (clearmost families), attended court events, lavish fittings that displayed family status were required, making it a showcase for the skill of kinkoshi (metal craftsmen), lacquerers, and sheath makers. The ordering of hansatachi koshirae played a significant role in raising the technical standards of these craftspeople involved in sword mountings.

Extant Notable Examples — Focused on Museum Collections

Notable examples of hansatachi koshirae still in existence are housed primarily in major art museums, museums, and shrines. The Tokyo National Museum houses several pieces from the late Muromachi through early Edo periods, and the artistic design of their lavish fitting ornaments has attracted the attention of researchers. In shrines in Kyoto, tachi and hansatachi formerly donated by kuge are preserved, and are carefully maintained as religious implements.

The following three points are common features of these examples:

• High-quality handle work using white shirosame-kawa (white shark skin) or tea-dyed shark skin on the handle
• Lavish fuchi and menuki made using gold, red copper, and shibuichi
• Sheaths with black lacquer finish decorated with makie or chinkane

The ashikanamono typically number 2–3 locations, and high-quality nishikori or kumihimo is used for the sageo. The blade signatures are often from first-rate sword craftsmen of the period, demonstrating the formal status of the fitting and blade as an integrated masterpiece.

Modern Evaluation and Research

In modern Japanese sword research, hansatachi koshirae is a relatively understudied field compared to blade research, and discussions continue among sword mounting specialists regarding its definition and scope. In the examination process of the NBTHK (Japanese Sword and Curio Preservation Society), blade appraisal is the main focus, and fittings are often evaluated as tsukitari (attached articles), though the fittings of notable examples may receive independent designation as important cultural properties.

From the perspective of enthusiasts and collectors, hansatachi koshirae is popular as "reasonably-priced formal-grade fittings" because it is more obtainable than pure tachi koshirae (a larger number are in circulation due to lower formal status) and yet possesses higher formal grade than uchigatana koshirae. However, distinguishing forgeries and later-added (atsugi) fittings requires expert knowledge, and consultation with a trusted sword dealer or appraisal institution is strongly recommended when purchasing. As of 2026, masterworks of hansatachi koshirae are increasingly appearing in auctions by international auction houses, and international interest is growing.