Top 15 Underrated Japanese Action Novels in 2026

2026 Edition

Updated January 27, 2026

Editor's Picks

15 Novels

Underrated doesn't mean bad. These japanese action have quality that exceeds their readership numbers. Sometimes that's timing. Sometimes it's marketing. Sometimes readers just haven't found them yet.

I've looked for entries that deserve more attention based on actual quality rather than popularity metrics.

1
TOP PICK
My Death Flags Show No Sign of Ending
4.5
(2.0K ratings)
Genre: action, adventure, drama
When he came to his senses, Hirasawa Kazuki, a normal university student, found himself in possession of the body of a game’s character. Moreover, it was Harold Stokes, the story’s most hated character who was even given the title 『King of Tr*sh』by the players.
First Impressions
"My Death Flags Show No Sign of Ending" has been quite the ride! Jumping into this isekai adventure, I was immediately hooked by the unique premise. It's not every day you see a protagonist reincarnated as a villain, especially one with a rather… unfortunate speech impediment. The initial chapters grabbed me with their blend of humor and intrigue. The protagonist, a university student reborn as Harold Stokes, a hated character from a game he loves, immediately has to navigate a world where his words constantly betray his intentions. It's a clever twist on the usual isekai formula and sets the ...
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2
RUNNER UP
Overlord (LN)
4.5
(1.6K ratings)
Genre: action, adventure, drama
In 21st century, world entered a new stage of VR games…and “YGGDRASIL” is considered top of all MMORPG…but, After announcing that all its servers will be off, the internet game ‘Yggdrasil’ shut down…or so was supposed to happen, but for some reason, the player character did not log out some time ...
First Impressions
"Overlord" is a web novel that really grabbed my attention, and I can definitely see why it has such a dedicated following. It's a unique take on the isekai genre, and while it might not be for everyone, it offers a compelling experience that sets it apart from the usual light novel fare. Initially, I was drawn in by the premise: a player trapped in a game as an all-powerful undead overlord. It's a classic setup, but "Overlord" quickly establishes its own identity. The main character, Ainz (formerly Momonga), isn't your typical hero. He's a complex character, still clinging to his human past w...
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Completed
3
HIGHLY RECOMMENDED
The Lazy King
4.5
(1.2K ratings)
Genre: action, comedy, fantasy
By the time I realized it, I had reincarnated into another world. I kept sleeping, and at some point I became a Demon Lord.
First Impressions
"The Lazy King" is definitely a web novel that sticks with you long after you've finished reading. With a solid 4.5/5 rating from over a thousand readers, it clearly has a special something that resonates. I went in expecting a lighthearted romp, but what I found was a surprisingly deep and thought-provoking story. Initially, the premise seemed straightforward: a reincarnated demon lord whose power grows the more he sleeps. The cover might give you the wrong idea, suggesting a more action-oriented story, but the reality is far more nuanced. The main character, Liege, embodies sloth, and much o...
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Completed
4
EDITORS CHOICE
The Girl Who Ate a Death God
4.8
(812 ratings)
Genre: action, fantasy, mature
What happens when one eats Death? Personally, I don’t really know.
First Impressions
"The Girl Who Ate a Death God" is a dark fantasy war story that really sunk its teeth into me. It's not always a comfortable read, but it's a compelling one, following a unique protagonist through a brutal and unforgiving world. Initially, I was a little hesitant. The first few chapters felt somewhat dry, focusing heavily on military formations and the political landscape, which made it difficult to connect with the story. However, I'm glad I stuck with it, because as the story progressed, I found myself increasingly invested in Schera's journey and the world around her....
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Completed
5
EDITORS CHOICE
Apotheosis of a Demon – A Monster Evolution Story
4.5
(798 ratings)
Genre: action, adventure, drama
A back-to-basics(? ) monster evolution novel.
First Impressions
"Apotheosis of a Demon – A Monster Evolution Story" promised a unique take on the isekai genre, and after diving in, I can say it mostly delivers, though not without a few stumbles along the way. The story follows Shedy's journey from abused human to demon goddess, and it's a wild ride. I was immediately drawn in by the premise. A protagonist who isn't afraid to get her hands dirty and doesn't bother with "righteous" justifications? Sign me up! The initial chapters are compelling, and I found myself eager to see how Shedy would navigate this new, dangerous world....
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Completed
6
#6 PICK
Kono Subarashii Sekai ni Shukufuku o!
4.5
(625 ratings)
Genre: action, adventure, comedy
Kazuma Satou is a shut in who loves games, and his life ended suddenly… appearing before him is a beautiful girl claiming to be a goddess. Kazuma, who was transported into another world, worked hard to earn a living!
First Impressions
"KonoSuba" has been on my radar for a while, and diving into this isekai comedy was quite the experience. It's definitely not your typical power-fantasy, and that's precisely where its charm lies. The novel gleefully subverts tropes, and I found myself chuckling at the sheer absurdity of the situations our protagonist, Kazuma, finds himself in. The premise itself is hilarious: a NEET dies a pathetic death and is offered a second chance in a fantasy world, with the option to bring one item or ability. In a moment of spite, he chooses the goddess Aqua, and that's where the real chaos begins. My ...
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Completed
7
#7 PICK
Shini Yasui Kōshaku Reijō to Shichi-nin no Kikōshi
4.5
(638 ratings)
Genre: action, adventure, fantasy
On one spring evening when I was eight years old, I, Erica, Duke of Aurelia’s daughter, realized something. Huh, I have reincarnated into a fantasy world, haven’t I?
First Impressions
"Reincarnated as a villainess" stories are a dime a dozen, so I went into Shini Yasui Kōshaku Reijō to Shichi-nin no Kikōshi with a healthy dose of skepticism. However, I quickly found myself pulled in by the unique premise and the promise of more than just your typical otome game fare. The detailed world-building and hints of mystery piqued my interest from the start, and I was eager to see how Erica would navigate her perilous situation. The strongest aspect of this novel, in my opinion, is its world-building. The author has clearly put a lot of thought into the intricacies of the world, fro...
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Completed
8
#8 PICK
Utsuro no Hako to Zero no Maria
4.7
(509 ratings)
Genre: action, drama, horror
Utsuro no Hako to Zero no Maria, or The Empty Box and the Zeroth Maria, tells the sinister story of Kazuki Hoshino, who is almost madly attached to his everyday life, and his antagonist Aya Otonashi, who suddenly transfers into his class—for the 13,118th time. She majestically announces to “brea...
First Impressions
"Utsuro no Hako to Zero no Maria" (Hakomari), where do I even begin? This series is a trip, a wild, psychological, romantic, and sometimes horrifying ride that had me hooked from the first volume. I went in expecting a mind-bending mystery, and while I got that, I also found a story that explores the depths of human desire and the consequences of wish fulfillment. The initial volume throws you headfirst into a non-linear narrative, a time loop that's as confusing as it is captivating. I'll admit, it took me a bit to get my bearings, but the intrigue was enough to keep me pushing forward. The p...
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Conclusion

Underrated picks are gambles on overlooked quality. I think these deserve more readers, but tastes vary. Worth exploring if mainstream recommendations feel exhausted.

Frequently Asked Questions

Our rankings consider multiple factors: reader ratings (40%), popularity and reading lists (25%), review quality (20%), and editorial assessment (15%). We update regularly to reflect new releases and changing reader preferences.

We update our rankings monthly to ensure they reflect the latest reader ratings and new novel releases.

How We Create Our 2026 Rankings

Our 2026 novel rankings are created through a comprehensive, data-driven process that combines quantitative metrics with qualitative editorial review. Here's how we ensure our rankings reflect the best novels available today.

Data Collection

We aggregate reading data, ratings, and engagement metrics from thousands of readers across multiple platforms, updated regularly throughout 2026.

Community Input

Reader ratings and reviews form the foundation of our rankings. We weight votes based on verified reading history to ensure authenticity.

Quality Scoring

Each novel receives a composite score based on average rating, vote count, reading list additions, and reader retention metrics.

Editorial Review

Our editorial team reviews top candidates for writing quality, translation accuracy, and overall reader experience.

Regular Updates

Rankings are refreshed quarterly to reflect new releases, updated ratings, and shifting reader preferences in 2026.

Transparency

We publish our methodology openly so readers understand exactly how novels earn their positions in our rankings.

Our 2026 Ranking Criteria

40%Reader Rating Score (weighted by vote count and recency)
25%Popularity Metrics (reading list additions, active readers)
20%Engagement Score (comments, reviews, recommendations)
15%Editorial Assessment (writing quality, translation, completeness)

Last updated: January 27, 2026 | Rankings reflect data collected through 2026

Ranked Novels

My Death Flags Show No Sign of Ending

First Impressions

Overlord (LN)

First Impressions

The Lazy King

First Impressions

The Girl Who Ate a Death God

First Impressions

Apotheosis of a Demon – A Monster Evolution Story

First Impressions

Kono Subarashii Sekai ni Shukufuku o!

First Impressions

Shini Yasui Kōshaku Reijō to Shichi-nin no Kikōshi

First Impressions