Mausoleum of Emperor Kōshō (Wakigami no Hakatayama no Ue no Misasagi)

The Wakigami no Hakatayama no Ue no Misasagi, in Mimuro, Gose City, Nara Prefecture, in the land of Katsuragi — designated and administered by the Imperial Household Agency as the mausoleum of the fifth emperor, Kōshō (Mimatsuhiko-Kaeshine no Sumera-mikoto). Far removed from Mt. Fuji, why does this Yamato mausoleum occupy a page in Fujiclan? Because for the Fuji family — the Fuji Daigūji house, the hereditary chief priests who have long borne the rites of Mt. Fuji — this imperial mausoleum is the spiritual point of origin to which the family’s lineage traces back.

According to the family tradition of the Fuji house, the Fuji are descended from Ametarashi-hiko-Kunioshihito, the son of Emperor Kōshō, through the lineage of the Wani-be clan. The Wani-shi keizu and Beppon Daigūji Fuji-shi keizu — the family genealogies — record that Wani-be no Omi Toyomaro, the seventeenth-generation descendant of Emperor Kōshō, in 795 (Enryaku 14) became the dairyō — chief administrator — of Fuji District in Suruga Province, and in 801 (Enryaku 20) took charge of the rites of the great deity of Mt. Fuji. This is recorded as the beginning of the Fuji family. From Toyomaro, the fourteenth-generation descendant Tokimune was the first to bear the title daigūji (chief priest); the fifteenth-generation Naoyo was the first to use the surname Fuji.

The inscription on the Fuyōkan monument — erected at the Fuji Daigūji residence in 1896 — also reads: “The Fuji family descends from Ametarashi-hiko-Kunioshihito, a son of Emperor Kōshō; its original family name is Wani-be.” Behind the Fuji family’s tracing of their lineage to Emperor Kōshō lies a religious-political intent: as a kōbetsu — an imperially derived lineage — they demonstrated that their stewardship of the rites of Mt. Fuji was no mere local custom but the work of a noble bloodline linked to the imperial line, fitting for the worship of a national sacred peak.

The name Wani-be points toward the ancestral territory of this lineage: the Wani district of Yamato Province, corresponding to the area around modern Wani in Tenri City, Nara Prefecture. Wani was an ancient settlement area with dense Yayoi-period remains; in time, a branch of the local clan was organised as a be — a hereditary occupational group under imperial patronage — bearing the name Wani-be, and members of this group were eventually dispatched to the provinces as district administrators. It is in this process that Toyomaro finds his place in the story. Yet reading the genealogy carefully, a question arises. Emperor Kōshō is placed by the traditional Nihon Shoki chronology in the fifth century BCE, and even by revised chronologies in the third or fourth century CE. Toyomaro’s appointment as district administrator in 795 (Enryaku 14) falls more than a thousand years later in either reckoning. Counting thirty years per generation, a span of a thousand years requires some thirty generations; the genealogy records only seventeen. This compression of generations is a well-documented feature of ancient Japanese lineage records, in which intermediate ancestors were routinely omitted or invented to reduce the genealogical distance to the imperial family. For the Fuji house, whose claim to preside over the rites of a nationally sacred peak rested precisely on the argument of imperial descent, the theological and political stakes of this genealogical statement were as high as any could be.

The Wani-shi keizu records that, when Emperor Kōshō passed away, he was “buried at Wakigami no Hakatayama” — the place corresponds to the present Wakigami no Hakatayama no Ue no Misasagi. Modern scholarship questions the historicity of the early emperors; Kōshō himself is one of the kesshi-hachidai — the “eight emperors of missing history” — and the Fuji family’s official use of the Wani-be surname does not appear in documents until 1462 (Kanshō 3), in the Muromachi era. There is therefore a strong view that this ancestral tradition is a later construction. Yet truth and construction aside, this remains the place where the figure the Fuji family has revered as their imperial ancestor for more than a thousand years is held to rest.

The photographs show the mausoleum standing quietly in a corner of a residential neighbourhood in late spring; the torii and Imperial Household Agency placard at the entrance; a small attached shrine beside the approach; and a stone torii bearing the inscribed plaque Kōshō-dō — “Way of Kōshō.” Given the character of a mausoleum dating to an emperor of pre-Kofun legend, the precincts themselves are a modest space of raked white gravel — yet folded behind them, more than two thousand years of layered time stretches by a single fine thread to the rites once performed on the summit of Suruga’s Mt. Fuji.