Is Ron Kamonohashi: Deranged Detective Worth Reading? Review & Where to Read

Overview

Ron Kamonohashi: Deranged Detective comes from Akira Amano, best known for Reborn!, and it swaps that series' mafia-comedy chaos for a detective story with real teeth. Ron is a brilliant private investigator, a self-styled descendant of both Sherlock Holmes and Moriarty, who lost his detective license five years before the story starts over an incident he can't remember. He lives in isolation until a hapless police detective, Totomaru Isshiki, starts bringing him cases — and taking public credit for solving them, since Ron can't officially work anymore.

What it does well

The buddy-detective setup is fun on its own, but what makes the series distinctive is what it's willing to do with Ron's character. He's not just eccentric — he has a real, troubling compulsion to push culprits toward confessing that crosses genuinely dark ethical lines, and the manga doesn't soften that or play it purely for laughs. That choice gives an otherwise familiar genre real stakes: you're not just wondering whether Ron will solve the case, you're wondering how far his methods will go this time.

The mysteries themselves hold up their end too. Amano builds proper whodunits with real clues and fair misdirection, not twists that come out of nowhere, which matters a lot for a series that runs this long. And the Ron/Totomaru dynamic — genius detective, credit-stealing cop who's in over his head — gives the whole thing a steady comedic backbone even when individual arcs get heavy.

It's also a series willing to commit to tonal range. Comedy and genuine darkness sit right next to each other, chapter to chapter, and that willingness to swing hard in either direction keeps nineteen volumes from ever feeling like it's coasting.

Where it falls short

That same tonal range is also the thing most likely to put readers off. The jump from goofy detective-comedy bits to genuinely disturbing psychological material can feel abrupt, and if you want a mystery series with a consistent, comfortable tone, this will keep surprising you in ways you might not want.

Ron himself is also, by design, a hard character to simply root for. His central flaw isn't a quirky character trait to be charmed by — it's meant to be uncomfortable, and a long series spent with a protagonist like that is a real commitment, not a cozy hang. And as the story goes on, some arcs lean more on the series' own mythology — Ron's forgotten past, the Moriarty family — than on fresh standalone cases, which can feel like a shift if standalone whodunits are what drew you in.

Verdict

If you want a detective series willing to make its hero genuinely unsettling rather than just quirky, this delivers on that promise for nineteen volumes without losing its mystery-plotting chops. If you need your mystery lead to stay likable throughout, go in aware of what you're signing up for.