Kanzaki

Biodata

Feature	Information
Name	Kanzaki
Gender	Male
Affiliation	Class B; Advanced Nurturing High School
Occupation/Role	Student; Class B vice representative; strategic group leader
First Appearance	Chapter 6
Status	Active

Background

Kanzaki initially keeps his distance from unfamiliar classmates; when Raku attempts to greet him after the entrance ceremony, Kanzaki quickly leaves. Despite this reserved start, he later becomes one of Raku's closest classmates through their shared habit of remaining in the classroom after school. 6 10

He attended his middle school's track-and-field club, though he was not its captain. He considers the school's clubs too professional and demanding for a casual interest, ultimately deciding not to join one. 9

Kanzaki becomes involved in Class B's efforts to understand the S System, prevent academic failures, and reach Class A under Ichinose's leadership. Though he states that he lacks the qualities of a leader, he commits to contributing through rational planning and practical support. 14 16

Personality

Kanzaki is detached, blunt, and highly observant. He quickly judges Raku's sedentary habits, notices Ichinose's attention toward him, and repeatedly questions behavior that does not fit Raku's usual reluctance to exert himself. 9 10 47

He is pragmatic about both school strategy and personal relationships. He dismisses high-school romance as a crutch rather than genuine love, evaluates plans by their likelihood of success, and is prepared to support morally questionable tactics when he considers them the class's only viable option. 12 29

Despite his harsh teasing and skeptical nature, Kanzaki is loyal to Class B and empathetic toward mistreated students. He supports Ichinose's goal of reaching Class A, speaks for Raku when others suspect him, and is concerned when Class C's Kaneda is driven out after being assaulted by Ryuen. 15 16 46

Abilities & Skills

Academic Analysis and Tutoring

Kanzaki systematically assesses classmates' weaknesses and organizes targeted preparation before examinations.

• Compiles individual data on students' weak points and plans focused training. 16
• Reports that the students under his supervision had reached scores of at least 70 after their study efforts. 16
• Notices the suspiciously incremental scores on Raku's practice papers and suspects he may be selecting answers deliberately. 16
• Participates in Class B's analysis of the S System and its effect on class points. 14 16

Strategic Planning

Kanzaki provides grounded tactical judgment during Class B's disputes and special examinations.

• Organizes a group that produces and distributes notices seeking information on Sudo's assault case. 28
• Acts as the listed contact for the notices and forwards responses to Raku. 28
• Supports Horikita's high-risk plan to pressure Class C, judging it to be Class B and D's only potential route to success. 29
• Identifies the danger of choosing a conspicuous student as Class B's leader during the island exam and proposes selecting a stable, less noticeable candidate. 41
• Questions suspicious restrictions before the island exam, correctly suspecting that confiscating students' belongings meant the trip was not merely a guesthouse stay. 40

Athletic Ability

Kanzaki retains strong conditioning from his track-and-field background.

• Has visible abdominal muscle definition and describes core exercises used in his former track training. 10
• Completes a 50-meter swim in 26 seconds, tying Shibata for the fastest initial time. 11
• Loses the follow-up race to Shibata by 0.6 seconds. 11
• Takes on practical work during the island exam, including searching the surrounding area and locating a ripe cornfield close to Class B's camp. 46

Perception and Suspicion

Kanzaki is difficult to mislead once he notices an inconsistency.

• Recognizes Ichinose's repeated attention toward Raku before Raku does. 9
• Questions why Raku has become unusually proactive on the island, citing his campsite scouting, firewood gathering, weeding, and hammock setup. 46
• Suspects Raku intentionally directed him toward the cornfield so that Kanzaki, rather than Raku, would receive credit for the discovery. 47
• Notices and asks about Raku's increasing contact with Shiranami. 39

Equipment / Items

• Class B special-exam key card — entrusted to Kanzaki while Ichinose and Raku leave camp to investigate other classes' territories. 49
• Sudo-case notices — prepared by Kanzaki's group to gather information about the assault dispute. 28

Relationships

• Raku — Neighboring classmate and close friend. Kanzaki frequently teases him for laziness, looks after him during swimming lessons, tutors him, and challenges his suspiciously proactive actions. 9 11 16 46 47
• Ichinose — Class B's representative and the person Kanzaki supports in the effort to reach Class A. He trusts her leadership despite believing himself unsuitable to lead. 16
• Shibata Sou — Athletic rival; they tie in the initial 50-meter swim before Shibata narrowly wins their rematch. 11
• Okabe Kaito, Takashima Yoji, and Shiratori Naoto — Part of the group of Class B boys who regularly remain after school and become friends with Raku and, at times, Kanzaki. 10
• Kaneda Satoru — A Class C student whom Kanzaki's class shelters after Ryuen assaults and expels him; Kanzaki shows concern over his treatment. 46
• Horikita Suzune — Works with Kanzaki and Ichinose during the plan to resolve Sudo's case; Kanzaki agrees that her risky strategy may be their only workable option. 29
• Class D — Kanzaki helps Class D's effort to clear Sudo by supporting the information campaign and later allowing repayment of Class B's loan before graduation rather than demanding immediate reimbursement. 28 34

Story Role / Major Arcs

Early School Life

Kanzaki declines the club system despite his track background and begins forming a friendship with Raku through their shared after-school routine. He acts as a blunt but attentive observer of Raku and Ichinose's interactions. 9 10

S System and Midterm Preparation

As Class B responds to the uncertainty surrounding school points, Kanzaki helps analyze the system, supports Ichinose's Class A ambitions, and conducts focused academic training for classmates. 14 16

Sudo Assault Case

Kanzaki leads the production of notices seeking information about Sudo's case, supports cooperation with Class D, and backs Horikita's deception-based plan when conventional options appear exhausted. After the plan fails, he and Ichinose go to assist with the final proceedings. 28 29 31

Island Special Exam

During the Freedom special exam, Kanzaki warns Class B about the risks surrounding leader selection, assists with organizing the boys, investigates the island's resources, and discovers a cornfield capable of sustaining the class for several days. His suspicions of Raku's hidden motives intensify as Raku becomes unexpectedly industrious. 40 41 46 47

Trivia

• Kanzaki considers Raku physically soft and undertrained, comparing his muscles to pork being evaluated at a market. 10 11
• He is Class B's vice representative. 28
• He describes high-school romance as a “crutch,” reflecting his cynical view of adolescent relationships. 12