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Gate Closed

青山 剛昌 [Gōshō Aoyama]

Cover of Gate Closed

Gate Closed

Age Rating, Reading Level & Content Guide

by 青山 剛昌 [Gōshō Aoyama]

Reading Level 4-5 9LE Ages 9-12 Balanced Read

The text is written at a 4th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content is mild with minimal sensitive material.

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About This Book

Here’s a secret: when Conan opens the door during a school trip, a teacher’s frozen body tumbles right inside! No one expected a quiet mountain cabin to hide such a chilling mystery, but that’s only the beginning.

Themes

MysteryDetectivesFriendshipAdventureChildren's fictionCartoons and comics

Quick Assessment

Gate Closed is a middle-grade detective fiction graphic novel suitable for ages 9-12. It follows Conan and his friends as they uncover a mysterious frozen teacher during a school trip, combining suspense and problem-solving without graphic content. Parents should note mild suspense and thematic elements of mystery.

Why we rated Gate Closed 9LE

Gate Closed is written at a Level 4-5 reading level across 192 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, Gate Closed works for readers up to grade 6.5.

We rate Gate Closed as 9LE ("Light — Emotional") because the content sits in the "Mild" range — mild conflict — the kind a child encounters in normal play and sibling life. Across our four dimensions (emotional, physical, social, thematic) the book reads as evenly mild; no single dimension stands out as a concern.

No specific content flags were raised by community reviewers, which is consistent with the mild intensity score.

Thematically, Gate Closed explores mystery, detectives, friendship, adventure, and children's fiction — these threads give the book room to mean different things to different readers.

Good fit for

  • Children in the Ages 9-12 range — the maturity and attention span match the story's pacing.
  • Kids drawn to stories about mystery, detectives, friendship.

Maybe not for

  • ! Readers looking for something heavier — this is a gentle, low-stakes story by design.

For Parents

Content Intensity

9LE — Light — Emotional
Emotional
Light
Physical
Light
Social
Clear
Thematic
Light

Light conflict or tension. Mild peril resolved quickly.

Data confidence: standard

Was our "Mild" content intensity rating accurate for this book?

Reading Insights

Hook Factor

3/10

A steady, thoughtful read that rewards patient readers.

Discussion Potential

1/10

A lighter read — great for independent enjoyment.

Book DNA

Multi-dimensional content fingerprint

Vocabulary Level
4
Emotional Weight
4
Theme Richness
6
World Scope
1
Data Confidence
7

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Details

Book Length

192 pages
ISBN
9780575080805
Pages
192
Publisher
Phoenix
Published
2007
Type
Fiction

Genres

Subjects

Cartoons and ComicsDetectives