The Underworld Arc

Lore & Background

In the mythology Adachitoka builds for Noragami, the underworld is not a single pit of fire but a structured realm with its own bureaucracy, its own god, and its own servants. The shikabane are those souls—often the remnants of the dead or the echoes of the forgotten—who are bound to serve in that realm. They are not demons, not ghosts in the Western sense, but something closer to civil servants of the afterlife, carrying out tasks that keep the boundary between the living and the dead from collapsing. Their existence is governed by rules older than any human religion, and breaking those rules carries consequences that ripple through both worlds. Bishamonten, the god of the underworld, is the authority who enforces those rules. He is not a villain in the traditional sense; he is a functionary of cosmic order. His domain is the maintenance of the boundary, and the shikabane are his instruments. When a shikabane is created, it is not a gift but an assignment, and the person bound to it carries a weight that others in the living world cannot see. This is the tension that drives the arc: the shikabane is told it exists to serve, yet it is also, in its own quiet way, a person with desires, fears, and a stubborn will to be more than a tool. The arc also deepens the relationship between gods and the underworld. Yato, as a minor god, exists at the very bottom of the divine hierarchy, and his connection to a shikabane places him in constant, low-level negotiation with forces far above him. This creates a persistent undercurrent of tension throughout the series: every act of kindness Yato performs for a human is also a small defiance of the order that says the dead should be left to their own affairs.

Reader's Guide

The Underworld Arc — spans the middle portion of the manga (roughly the 30s through 50s chapter range) and is the primary narrative focus of the second anime season, Noragami Aragoto (2015). The central conflict: Yukine's true nature as a shikabane is laid bare, and the rules governing the underworld demand that he exist solely as a servant. The stakes are personal and structural simultaneously—Yukine's identity, Yato's place in the divine hierarchy, and the integrity of the boundary between the living and the dead are all in play. If the shikabane's purpose is violated, the consequences are not merely emotional; they threaten the very mechanism that keeps the worlds separate. Key characters: Yukine (the shikabane at the center of the conflict), Yato (the minor god bound to him), Bishamonten (the underworld's governing authority), Hiyori Iki (the human girl whose perspective grounds the supernatural), and the broader cast of minor gods and shikabane who populate the underworld's periphery. How it advances the overarching plot: This arc establishes the rules that every subsequent story must operate within. Once the audience understands what a shikabane is, what the underworld demands, and what Bishamonten enforces, later arcs—whether they involve the "two woods" (Futaba), Yato's own origins, or the larger creation mythology—gain their full weight. The Underworld Arc is the foundation on which the rest of Noragami's mythology is built. Note: Some of the deeper underworld lore and Bishamonten's fuller role are explored more extensively in the manga than in the anime adaptation. Readers of the manga will encounter additional context and character development not present in the animated episodes.

Did You Know?

• Bishamonten, the god of the underworld, is based on the real-world Hindu deity Vaisravana (Bishamonten in Japanese), one of the Four Heavenly Kings in East Asian Buddhist tradition.
• Yukine's transformation into a shikabane is not a simple curse or blessing—it is an assignment with legal weight in the underworld's own system, meaning his choices carry obligations that extend beyond his personal will.
• The 5-yen coin that Yato charges for his services is a deliberate inversion of the idea that divine help should be free or priceless; it grounds his godhood in something small, human, and almost embarrassingly cheap.