Hōju

Hōju was a group of swordsmiths representing the Ōshū Kaji (Mutsu Province swordsmiths), based in Mutsu Province (present-day Aomori, Iwate, Miyagi, and Fukushima Prefectures) and active from the late Heian period through the early Muromachi period. Belonging to the Mogusa school, the Hōju lineage is uniquely recorded as continuing from the Heian period through the Muromachi period.

Origins and the Mogusa School

Hōju formed the core of the Mogusa lineage of Ōshū swordsmiths and is considered to have played a significant role in the formative period of Japanese swordmaking. It has been suggested that Arimasa, father of the celebrated Ko-Bizen smith Masatsune, came from an Ōshū swordsmith background, and Hōju's blade style has been noted as resembling that of the Ko-Hōki tradition, underscoring its importance to the origins of Japanese sword craftsmanship.

Historical Background

After Minamoto no Yoritomo's conquest of Ōshū, Hōju smiths dispersed across the country, and their original base in Mutsu Province declined. This dispersal, however, spread the reputation of Mogusa swordsmithing more widely, preserving its name and techniques for later generations.

Surviving Works

Hōju's signed works are rare and valuable. Surviving examples from the Kamakura period include a blade signed "Yamato-no-kuni-jū Tōmoto Hōju" dated Enkyō 4 (1311), and a tachi from the Shōchū era (1324–1325) designated an Important Art Object.

Evaluation and Tradition

The Gikeiki (Chronicle of Yoshitsune) records a retainer of Minamoto no Yoshitsune praising the cutting sharpness of a "sword forged by Mogusa," describing it as so keen that "there is no resistance when cutting into the abdomen" — evidence that Mogusa smithing's superior craftsmanship was widely recognized in its own time.