Case closed
青山 剛昌 [Gōshō Aoyama]
Case closed
Age Rating, Reading Level & Content Guide
by 青山 剛昌 [Gōshō Aoyama]
The text is written at a 4th grade reading level, the subject matter is intended for middle graders (ages 9–12), and the content has moderate intensity with some emotionally heavy themes.
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About This Book
Jimmy Kudo is a high school detective, but suddenly he’s trapped in a kid’s body! While chasing mysterious men in black, he’s racing against time to solve a chilling murder with only a cryptic message as a clue. Just when he thinks he’s getting close, a new suspect appears with a devilish disguise—what secrets will Conan uncover next?
Quick Assessment
This graphic novel follows Jimmy Kudo, a teenage detective who is mysteriously transformed into a child while investigating a dangerous organization. Despite his new form, he continues solving complex cases, including a series of murders with eerie clues. Suitable for ages 9-12, it features moderate mystery themes and some suspenseful moments but contains no graphic violence.
Why we rated Case closed 9MT
Case closed is written at a Level 4-5 reading level across 160 pages. Strong independent readers around grade 5.5 can typically handle this book on their own; with parent or teacher support, Case closed works for readers up to grade 6.5.
We rate Case closed as 9MT ("Moderate — Thematic") because the content sits in the "Moderate" range — moderate conflict that may involve loss, scary scenes, or interpersonal stakes. The strongest signals come from thematic difficulty — these are the dimensions parents should evaluate against their reader's tolerance.
No specific content flags were raised by community reviewers, which is consistent with the moderate intensity score.
Thematically, Case closed explores mystery, detectives, adventure, and graphic novels — 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, adventure.
Maybe not for
- ! Readers who get easily upset by emotional or moderately dark scenes — the conflict here is real, not just background flavor.
For Parents
Content Intensity
9MT — Moderate — ThematicReal stakes and emotional weight. May include sustained danger, loss, or bullying.
Was our "Moderate" content intensity rating accurate for this book?
Reading Insights
Hook Factor
3/10A steady, thoughtful read that rewards patient readers.
Discussion Potential
2/10A lighter read — great for independent enjoyment.
Book DNA
Multi-dimensional content fingerprint
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青山 剛昌 [Gōshō Aoyama]
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青山 剛昌 [Gōshō Aoyama]
Details
Book Length
- ISBN
- 9781421577852
- Pages
- 160
- Publisher
- VIZ Media LLC
- Published
- 2016
- Type
- Fiction