Okaburaya Shrine — 大鏑矢神社

Okaburaya Shrine stands on the forested slopes of Mount Ōtakine in Tamura, Fukushima, at the precise spot where—according to local tradition—the warrior Sakanoue no Tamuramaro shot a whistling arrow into the earth in 801 CE to mark his victory over the northern tribes. The shrine’s name means “Great Whistling Arrow,” and the legend holds that the arrow he fired—a kaburaya, designed to make a shrieking sound in flight—lodged so deeply into the mountainside that it sprouted roots and grew into a cedar tree. That tree, now over twelve centuries old, still stands beside the main hall, its trunk blackened and hollow but alive, wrapped in sacred rope.

The shrine was established in the early Heian period following Sakanoue no Tamuramaro’s campaign to subjugate the Emishi people of northern Japan. Emperor Kanmu had appointed Tamuramaro as Seii Taishōgun (Barbarian-Subduing General) in 797 CE, and by 801 CE he had pushed deep into what is now Fukushima Prefecture. The shrine was likely founded within decades of his campaign, built to enshrine the warrior’s spirit and commemorate imperial authority in a region that had resisted central control. The current structures date to the Edo period, rebuilt in 1688 after a landslide destroyed the original complex, but the sacred cedar and the stone foundation beneath the honden are believed to be original to the site.

Sakanoue no Tamuramaro is enshrined here as a deified warrior spirit (bushin). Though not one of the classical kami of the Kojiki or Nihon Shoki, Tamuramaro achieved near-mythical status in the centuries following his death in 811 CE, particularly in the Tōhoku region where he is venerated as a bringer of order and protector against misfortune. He is associated with martial courage, victory in conflict, and the protection of borders. Some scholars suggest that the shrine also absorbed older mountain worship practices, and that the cedar itself may have been venerated long before the historical Tamuramaro arrived.

The whistling arrow legend is recorded in the Mutsu Fudoki, a now-lost provincial chronicle reconstructed from Edo-period copies. After defeating the Emishi chieftain Aterui’s forces near present-day Tamura, Tamuramaro climbed Mount Ōtakine to survey the pacified land. He drew his bow and shot a kaburaya—an arrow with a bulbous, perforated head that screams as it flies—toward the heavens as an offering to the war god Hachiman. The arrow descended and struck the mountainside with such force that it buried itself to the fletching. By the next morning, green shoots had emerged from the shaft. Within a year, it had become a cedar sapling. The tree grew for twelve centuries, and even now, priests say, if you press your ear to the trunk during a storm, you can hear a high whistling sound—the arrow’s eternal cry.

The shrine complex is small and remote, consisting of a single-bay honden in the nagare-zukuri style, a simple wooden worship hall, and a weathered stone torii at the mountain path’s entrance. The sacred cedar (goshintai) stands directly beside the honden, its trunk nearly four meters in diameter at the base, split open on one side to reveal a hollow interior large enough to stand in. The tree is wrapped with a massive shimenawa rope replaced every New Year. A small stone marker at the tree’s base bears the characters “矢の根” (“arrow root”). The shrine grounds offer a view across the Abukuma Valley, the same vista Tamuramaro would have seen in 801 CE, now dotted with rice fields and the occasional power line.

• Yabusame Dedication (May 5) — Horseback archery performed by local riders in the clearing below the shrine, ending with a whistling arrow shot toward the sacred cedar
• Cedar Rope Renewal (January 1) — The shimenawa is replaced at dawn by shrine families who have performed the task for fourteen generations
• Tamuramaro Memorial (August 13) — Commemoration of the general’s death, with offerings of sake and arrows placed at the tree’s base

Early May, before the horseback archery festival, when the mountain paths are dry and the cedar’s new growth emerges in bright green needles against the ancient blackened bark. Autumn is also striking—the surrounding forest turns gold and red, and the shrine is nearly empty. The approach path is steep and uneven; allow forty minutes from the trailhead.