What made Atago-san Tarōbō "the supreme commander of the tengu"? The question lies in the overlap between the history of the Atago cult and the figure of this single tengu.

As a sacred mountain of fire-warding, Mt. Atago was the center of the Atago Gongen cult, syncretized with its original Buddhist form, Shōgun Jizō. The Hakuun-ji engi^[3], which transmits its founding, tells of the ascent of En no Ozunu and Taichō, the shrine on Asahi Peak, and the syncretism with Shōgun Jizō. Shōgun Jizō is an armored Jizō mounted on horseback, joining victory in war with protection from fire. Bearing the numinous power of this Atago Gongen, Tarōbō took on the character of a thaumaturge and guardian deity surpassing any mere mountain apparition. The star-anise flower against fire, the talismans above each hearth, the Atago confraternities (kō) across the land—this density of folk practice was the foundation that raised Tarōbō to the summit of the tengu of every province.

The oldest-class textual witness to his proper name is found in the Engyō-bon Tale of the Heike^[4] (transcribed 1309–10), where he appears as "the foremost great tengu of Japan" and "Tarōbō of Mt. Atago." As to his identity, the theory in the Genpei Jōsuiki^[2] of the fallen Shinzei (Kakimoto no Ki Sōjō) is renowned; but Shinzei was a man of the early Heian period, and since the dates do not match the era the Jōsuiki sets, this is an undeterminable "tradition." It should be read as a tale that lays over Tarōbō the Buddhist notion that arrogance casts a high monk down into a tengu, and his origin cannot be fixed to a single source.

His standing as supreme commander is attested by both the performing arts and the scriptures. The Noh play Kurama Tengu^[5] of the Muromachi period chants the great tengu of the provinces in geographical order, and the early-modern Tengu-kyō^[1] arrays the forty-eight tengu and places Tarōbō at their head. The image of him leading a retinue of crow-tengu and commanding the lords from Hira-san Jirōbō downward rests upon this accumulation of medieval tengu tales. An iconography of him armed and astride a boar is also transmitted, yet his essence lies in being a Gongen-like presence enthroned on the peak, guarding the sacred precincts across Yamashiro. Chigiri Kōsai^[6] of tengu scholarship likewise set Tarōbō at the apex of the great tengu of all the mountains.