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The Death Note universe, created by Tsugumi Ohba and Takeshi Obata, is built upon a rigid, meticulously defined set of supernatural rules. Among these rules governing the Shinigami realm and their interaction with the human world, few objects hold as much fascination as the titular notebook—the Death Note. Capable of ending a human life simply by writing a name while picturing the individual's face, the notebook is a weapon of absolute power.
Naturally, this premise invites complex theoretical questions regarding the mechanics of ownership, possession, and the distribution of Shinigami artifacts. One of the most intriguing and frequently debated queries among fans of the psychological thriller is: Can a human legally and practically possess two Death Notes at the same time?
To answer this question thoroughly, we must look deeply into the canonical rules established in the manga and anime, examining the nature of Shinigami ownership, the consequences of multiple notebooks entering the human world, and the precise definitions of "possession" versus "ownership" within the bureaucratic framework of the Shinigami Realm.
The fundamental Rules of Death Note Ownership
Before evaluating the possibility of dual possession, we must first review how a human comes into possession of a Death Note in the first place. According to the official "How to Use It" rules dictated by the series:
The Human World Rule: Death Notes dropped into the human world by Shinigami rightfully belong to that Shinigami, but they effectively become the property of the human who first touches them and picks them up.
The Ownership Transfer: A human can give up ownership of a Death Note voluntarily, losing all memories associated with it, or pass it directly to another human while retaining their memories, provided they maintain physical contact during the transfer.
The Six-Note Limit: One of the most critical rules regarding the scale of Death Notes in the human world is the "Six-Notebook Limit Rule." This specific rule states that up to six Death Notes can exist simultaneously in the human world.
Because multiple Death Notes can actively circulate within human society at any given time—as demonstrated prominently during the Kira Investigation arc, where Light Yagami, Misa Amane, and Teru Mikami (and later archive copies or additional Shinigami drops) juggle notebooks, the physical coexistence of multiple notebooks is entirely canonical. However, coexistence is not the same as single-human dual possession.
Defining "Possession" vs. "Ownership" in the Canon
To understand whether a single individual can hold dominion over two notebooks at once, we must distinguish between owning a Death Note, possessing it physically, and being recognized by a Shinigami as its master.
In the lore, a human can technically hold multiple physical notebooks. During the Yotsuba Group Arc, Light Yagami manages to recover his memories and orchestrates a complex plan. At various points, characters interact with Misa Amane’s notebook (originally Sidoh’s, dropped by Ryuk), Light’s original notebook (dropped by Ryuk), and Rem’s notebook (which she leaves behind upon her death, subsequently taken by Misa and later given to Teru Mikami).
However, holding a notebook physically and having the supernatural rights to it are governed by distinct stipulations:
The Shinigami Association: A Shinigami is bound to the human who possesses their specific notebook. If a human were to acquire a second notebook, they would theoretically interact with a second Shinigami (unless a single Shinigami dropped or lent multiple notebooks, though Shinigami are generally restricted to one notebook per lifetime, with rare exceptions like Sidoh losing his and Jealous dying).
Memory Retention: If a human relinquishes ownership of a notebook, they lose their memories of it. But what happens if they add a second notebook while retaining the first?
Canonical precedents and Near-Misses
Throughout the series, we see characters come dangerously close to dual ownership, or manipulate multiple notebooks sequentially, which gives us structural insight into how the rules react.
Light yagami’s manipulation of multiple books
Light Yagami is the ultimate master of juggling Death Notes. At the peak of his power, Light orchestrates a scenario where:
He owns his primary notebook (Ryuk’s).
He manipulates Misa Amane (who owns Rem’s former notebook).
He utilizes Teru Mikami as an extension of his will, handing Mikami a third notebook (Gelus's notebook, formerly Misa's).
While Light orchestrates the actions associated with multiple notebooks, he is careful to maintain specific ownership chains to avoid rule violations. For instance, when Light temporarily relinquishes ownership of his own notebook to renounce his memories and fool L and the task force, he passes it to the task force while Misa retains hers. At no single moment does Light legally declare himself the simultaneous owner of two distinct notebooks under the eyes of the Shinigami King's decree, though he exercises operational control over them.
What happens when one Human touches two notebooks?
According to the rules, if a human touches a Death Note belonging to someone else, they gain the ability to see the associated Shinigami and retain memories of that specific book if they already own a Death Note or touch an active one. However, the rule regarding multiple notebooks explicitly states that if a human owns two Death Notes, the rules of the Death Note still apply, but certain restrictions overlap.
Specifically, let us examine the rule regarding ownership transfer and overlapping rules:
“The human who uses the Death Note can neither go to Heaven nor Hell.” “The use of a Death Note in the human world affects other humans' lives…”
More importantly, the rule regarding simultaneous possession dictates that if a human comes into possession of a second Death Note while already owning one, the ownership of the first notebook does not automatically cancel out, but the rules of the notebook bind the user collectively.
The mechanics of dual Ownership: Rules and limitations
If a human were to successfully claim ownership of two Death Notes at the exact same time, say, by picking up two separate notebooks dropped by two different Shinigami, how would the supernatural mechanics function?
The Shinigami Bond: Each Death Note is tethered to the life span and existence of a specific Shinigami. If Human A owns Notebook X (belonging to Shinigami X) and Notebook Y (belonging to Shinigami Y), both Shinigami are legally bound to follow Human A around in the human world (though usually only one stays close, while the other might observe or remain in the realm, depending on proximity agreements). This creates a logistical nightmare for the human, who would have multiple invisible Shinigami hovering over their shoulder.
The Eye Deal Multiplier: The famous "Shinigami Eyes" deal, which trades half of a human’s remaining lifespan for the ability to see names and lifespans over people's heads, can only be made once per person per notebook interaction, but owning multiple notebooks does not grant "double" eyes or enhanced vision. The trade is absolute. However, making the deal with one Shinigami grants the power universally across all notebooks the user interacts with.
The Rules of Killing: Writing a name in Notebook X versus Notebook Y yields identical results. There is no cumulative or compounding effect (e.g., writing a name in two books does not cause double death or bypass supernatural protections). However, having two books doubles a human's ammunition, providing a backup supply of pages and reducing the risk of running out of writing space, a logistical limitation famously exploited in the manga's climax.
(This concludes the first part of the analysis. The second part will explore the psychological burden on the user, the Shinigami Realm's legal penalties for hoarding notebooks, and the ultimate climax of multi-notebook interaction in the series.)
Tactical implications and functional rules of dual ownership
The mechanics of dual writing
Owning multiple notebooks unlocks specific tactical synergies. According to official lore specifications, if a human possesses two active Death Notes, they can divide the execution requirements between them. For instance, an operator can visualize the target while writing the individual's name in the first Death Note, and detail the specific cause and conditions of death in the second. The order of these entries is functionally interchangeable, providing a layer of operational flexibility that can bypass certain logistical constraints during high-stress scenarios.
Limitations, ceilings, and safeguards
Despite the tactical advantages, severe limitations govern multi-note possession:
The Six-Note Ceiling: A maximum of six Death Notes are permitted to remain active simultaneously in the human world. While a single individual can technically amass multiple notebooks (up to all six under specific Shinigami distribution limits), any notebook beyond this threshold remains inert.
Simultaneous Entry Conflicts: If a user attempts to write the same target's name across multiple notebooks within a 0.06-second window, the action is registered as a simultaneous clash, nullifying the effect entirely and sparing the target.
Memory Retention upon Forfeiture: Relinquishing ownership of one notebook while retaining another ensures that memories tied to the lost artifact are preserved, provided at least one active link to a Shinigami remains.
While a human can legitimately hold and utilize two Death Notes, the practice demands meticulous coordination to avoid administrative errors or overlapping execution triggers that could expose the operator.
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