Rai Kunitoshi

The Culmination of the Rai School: The Ultimate in Dignity and Refinement

Rai Kunitoshi was a swordsmith active in Kyoto from the late Kamakura period into its final years, and he is the peerless master who brought the Rai school of Yamashiro Province (present-day Kyoto Prefecture) to its full achievement. Positioned as the successor to Kuniyuki, who is regarded as the de facto founder of the Rai school, Kunitoshi not only led the Rai school's technique to its peak but is also highly regarded in later generations as the embodiment of the completed form of the Yamashiro tradition in the history of Japanese swords.

Kunitoshi's sword-making activity is known from extant signed works to span a broad period, from the Shōō era (1288–1293) to the Genkō era (1321–1324), and there is also a theory that two generations of the same name existed during this time. In the appraisal of Japanese swords, dated works are the most important material, and Kunitoshi's dated tachi and dated tantō have become standard reference pieces that are indispensable to the study of Kamakura-period swords.

The Essence of Technique: The Dignity of Suguha and Ko-midare

The greatest characteristic of Rai Kunitoshi's swords lies in their dignified suguha (straight hamon) and ko-midare (small irregular hamon). As a trait common to the entire Rai school, the hamon of the Yamashiro tradition stands apart from the splendid chōji-midare of the Bizen tradition and the vigorous nie-deki of the Sōshū tradition, and it holds depth and elegance within a neat, well-balanced hamon pattern. Kunitoshi's suguha is not monotonous: within the hamon, fine activity appears in the form of ko-nie, and fine sunagashi and kinsuji quietly gleam. Along the edge of the hamon, a faint haze called nioiguchi spreads like trailing mist, and this delicate gradation gives Kunitoshi's swords a distinctive, ethereal beauty.

The jigane (ground steel) is a finely tempered ko-itame-hada, and ji-nie (ground hardening particles) adheres finely and evenly, so that a silvery luster fills the entire surface. Furthermore, Rai school works often show a hada of weak forging on one side or on part of both sides; this is called Rai-hada and is regarded as a point of interest in appraisal. The curvature is based on the torii-zori (kyō-zori) typical of the Rai school, and its elegant form, tapering gradually toward the monouchi area, shows the ideal form of Kamakura-period tachi.

Kunitoshi also left outstanding works in the tantō. Even in making the tantō that became popular in the late Kamakura period, he did not compromise the dignity of the Rai school, and he left many works with a neat hira-zukuri form and a suguha in nie-deki.

The Importance of Dated Works: A Compass of the Kamakura Period

One of the reasons Rai Kunitoshi holds a special position in the history of Japanese swords is the survival of numerous dated works (nenki-saku). Ordinarily, smiths of the kotō period inscribed their name and place of production on the nakago (tang), but dated works that include a year era are relatively few. In Kunitoshi's case, several works bearing multiple era names from the late Kamakura period (Shōō, Einin, Shōwa, Gen'ō, and Genkō) survive, and these have extremely important academic value as standard works (kijun-saku) for tracing the changes in Kamakura-period sword-making.

Among the National Treasures are a tantō of Atsuta Shrine (inscribed Shōwa 5 = 1316), a tachi of the Tokugawa Art Museum inscribed "Rai Magotarō saku" (inscribed Shōō 5 = 1292; Rai Magotarō is considered to be a common name of Rai Kunitoshi), and a kodachi of Futarasan Shrine, among others. Important Cultural Properties also include designated tachi, tantō, and naginata.

The Lineage of the Rai School: From Teacher to Disciple

To understand Rai Kunitoshi's sword-making, it is important to know the lineage of the Rai school as a whole. The founder of the Rai school is said to be Kuniyoshi, but no works are certainly extant. Kuniyuki, active in the mid-Kamakura period, is regarded as the de facto founder of the school and laid the foundation of the Rai school. Rai Kunitoshi directly inherited this line of Kuniyuki and brought the Rai school to its height.

After Rai Kunitoshi, outstanding smiths such as Rai Kunimitsu, Rai Kunitsugu, and Rai Kuninaga emerged, and the Rai school flourished as a representative group of smiths of Yamashiro until the Nanboku-chō period. Kunitoshi's technical legacy was passed on to his disciples.

Particularly noteworthy is that Kunitoshi's style does not stop at the perfection of the "Rai school style"; it embodies the very "ideal of the Yamashiro tradition" that later smiths aimed for.

Rai Kunitoshi's Swords and TOUKENZA

The "beauty of dignified suguha" displayed in Rai Kunitoshi's swords is a concept that represents the core of the aesthetics of Japanese swords. In contrast to the masterworks of the Bizen and Sōshū traditions, which tend to compete in the splendor of their hamon or the boldness of their jigane, Rai Kunitoshi's swords embody the essence of the Yamashiro tradition, which places dignity and balance above all else. The Japanese aesthetic sense, that beauty lies in what remains after everything superfluous has been pared away, a spirit that connects to wabi-sabi, is expressed most purely in Rai Kunitoshi's swords.

To encounter Rai Kunitoshi's swords is nothing other than returning to the origin of the culture of Japanese swords.