Light Yagami from Death Note is most commonly typed as ENTJ in modern MBTI discussions, although some interpretations argue for INTJ because of his strategic intelligence, long-term planning, and reserved demeanor. When examined through the framework of Carl Jung's Chapter X of Psychological Types rather than modern personality stereotypes, ENTJ emerges as the strongest four-letter equivalent. Because Light is a fictional character and Jung never analyzed him, this interpretation is based on Light's observable cognitive style, decision-making, ambitions, relationships, and behavior throughout Death Note. The dominant function associated with the modern ENTJ type is Extraverted Thinking (Te). Jung described the extraverted thinking type as someone who directs psychological energy toward organizing external reality according to objective principles, efficiency, and deliberate structure. Light demonstrates this orientation through his desire to reshape society according to a systematic vision of justice. After acquiring the Death Note, he does not treat it merely as a personal weapon. Instead, he develops an elaborate external system in which criminals are eliminated according to predetermined rules, creating what he imagines to be a more orderly world. Light's thinking is strongly oriented toward implementation. He constantly evaluates people, circumstances, and information according to usefulness. The Death Note becomes a tool through which he attempts to impose his conception of order upon society. Rather than remaining satisfied with abstract ideals, he seeks concrete results: crime reduction, fear among criminals, and ultimately the establishment of himself as the central authority of the new world. This movement from principle to external organization is highly consistent with dominant Extraverted Thinking. Jung emphasized that extraverted thinking seeks to bring external circumstances into conformity with an objective framework. Light repeatedly demonstrates this tendency when he creates rules for using the Death Note, develops elaborate methods for concealing his identity, and constructs contingencies for situations he cannot completely control. His behavior is rarely random. Even apparently spontaneous actions generally serve a larger strategic objective. He continuously modifies his external environment so that events move closer to his intended outcome. The auxiliary function associated with ENTJ is Introverted Intuition (Ni). Jung described introverted intuition as an inward perception of possibilities, patterns, and future developments that are not immediately visible to others. Light possesses an exceptional ability to envision long-term consequences and construct strategies around them. His goal is not simply to eliminate individual criminals but to transform the structure of society itself. This requires an overarching vision that extends far beyond immediate circumstances. Light's strategic thinking frequently demonstrates Ni through his anticipation of future scenarios. He considers how investigators might respond, predicts the behavior of opponents, and develops plans involving multiple contingencies. His confrontation with L is particularly revealing. Light does not merely attempt to defeat L directly; he attempts to understand the structure of L's reasoning and anticipate how future events will unfold. He constructs elaborate sequences in which each action is intended to produce a specific later consequence. Jung's description of introverted intuition emphasizes perception of hidden relationships and future possibilities. Light constantly attempts to identify the invisible structure behind his circumstances. He asks not only what is happening but what it could lead to and how different variables can be manipulated toward a desired future. His intuition therefore functions as a strategic forecasting mechanism supporting his dominant external thinking. The tertiary function of ENTJ is Extraverted Sensing (Se). Jung described extraverted sensation as direct awareness of concrete reality and the ability to respond decisively to immediate circumstances. Although Light is primarily future-oriented, he possesses excellent situational awareness. He notices details in his environment, adapts rapidly when circumstances change, and can act decisively when opportunities arise. His academic success and ability to maintain a convincing public image also demonstrate strong awareness of external expectations. Light's use of Extraverted Sensing is especially apparent when he must improvise. Despite his elaborate plans, unexpected events frequently occur, requiring immediate adaptation. Rather than becoming paralyzed, he quickly identifies practical options and integrates them into his broader strategy. This allows him to maintain control even when circumstances become unpredictable. The inferior function of ENTJ is Introverted Feeling (Fi). Jung regarded the inferior function as the least conscious aspect of a personality, often appearing in distorted or underdeveloped forms. For Light, personal feeling and individual emotional values are consistently subordinated to his objective conception of justice. He rarely evaluates people according to their intrinsic personal worth. Instead, individuals become components within his broader system of judgment. Light's treatment of others illustrates this weakness. Friends, allies, investigators, and even romantic interests can become instruments for achieving his objectives. He can imitate affection and concern convincingly, but these expressions are frequently subordinated to strategic necessity. His moral framework is therefore highly impersonal: people are categorized according to whether they support or obstruct his vision. This represents a distorted relationship with Introverted Feeling because subjective individual values are suppressed beneath an external ideological system. Some viewers identify Light as an INTJ because of his introversion, intellectual independence, and extraordinary strategic planning. However, Jungian typology distinguishes introversion from social quietness. Light's defining psychological orientation is directed toward changing and controlling the external world. He seeks influence, authority, recognition, and tangible societal transformation. His intuition serves this external objective rather than functioning as the primary source of his psychological orientation. Therefore, dominant Extraverted Thinking is more convincing than dominant Introverted Intuition. Others may classify Light as an ENTP because of his adaptability and intellectual manipulation. However, Light is considerably more structured and goal-directed than the typical Ne-dominant interpretation. He does not explore possibilities simply for intellectual stimulation. He generates alternatives primarily to advance a predetermined vision. His reasoning is therefore more focused on implementation and control than open-ended experimentation, supporting the Te-Ni combination associated with ENTJ. Viewed through the framework of Chapter X of Psychological Types, Light Yagami most plausibly corresponds to the modern MBTI type ENTJ. His desire to impose an external system of order reflects dominant Extraverted Thinking, his long-term vision and strategic anticipation demonstrate auxiliary Introverted Intuition, his ability to respond effectively to immediate circumstances aligns with tertiary Extraverted Sensing, and his suppression of individual emotional values reflects inferior Introverted Feeling. Although fictional characters cannot be typed with absolute certainty, the ENTJ interpretation provides the most coherent explanation of Light's ambition, strategic behavior, leadership orientation, and psychological development according to Carl Jung's original theory presented in Chapter X of Psychological Types.