Top 13 Completed Japanese Action Novels in 2026

2026 Edition

Updated January 27, 2026

Specialized Lists

13 Novels

Completed novels offer closure that ongoing series can't guarantee. You won't hit a cliffhanger and discover the author dropped the project. For Japanese action novels specifically, completion often means you'll see power systems fully explored rather than abandoned mid-arc.

The trade-off is that some completed novels wrapped up hastily due to author burnout or publisher pressure. Check reviews for mentions of rushed endings before investing hundreds of chapters. Length isn't always quality, but for action novels, proper resolution of the power scaling matters.

Completed
1
TOP PICK
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
2
RUNNER UP
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
3
HIGHLY RECOMMENDED
Kumo Desu ga, Nani ka?
4.4
(1.9K ratings)
Genre: action, adventure, comedy
The world where the Hero and the Demon King continue to oppose each other. The grand magic from the Hero and the Demon King cross over worlds and exploded in the classroom of a certain high school.
First Impressions
"Kumo Desu ga, Nani ka?" is a web novel that took me on quite the ride. It's a reincarnation story with a twist, throwing our protagonist into the body of a spider monster in a deadly labyrinth. While the initial premise might sound familiar, the execution is anything but typical. Initially, I was hooked by the unique perspective of a spider navigating a dangerous world. The early chapters focus heavily on survival, grinding, and skill acquisition. Some might find this part slow-paced, and even repetitive, but I found it quite entertaining, especially with the main character's internal monolog...
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Completed
4
EDITORS CHOICE
Mushoku Tensei (WN)
4.3
(1.3K ratings)
Genre: action, adventure, comedy
A 34-year-old NEET otaku, chased out from his house by his family, found that his life is reaching a dead end. He then recalled that his life could actually have been much better if he had made better choices in the past.
First Impressions
"Mushoku Tensei" is a web novel that definitely left an impression on me. It’s one of those stories that sparks a lot of discussion, and after diving in, I can see why. It's a story about a man who gets a second chance at life in a fantasy world, and his journey of growing up and trying to live a better life than his first one. Initially, I was intrigued by the premise. A lot of people have praised it as a classic in the reincarnation genre, and I was excited to see what all the hype was about. The early parts of the story did a good job of setting up the world and introducing the main charact...
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Completed
5
EDITORS CHOICE
Akuyaku Reijo Ni Koi Wo Shite
4.4
(997 ratings)
Genre: action, drama, fantasy
When he regained consciousness he was already in another world. There was no meeting with a God, no cheat skills, just a sudden reincarnation.
First Impressions
Akuyaku Reijo Ni Koi Wo Shite (Falling in Love with the Villainess) is a web novel that took me on a rollercoaster. It's a story that clearly evokes strong feelings, both positive and negative, from its readers. While some found it to be a diamond in the rough, others felt it was a frustrating mess. I'm somewhere in the middle, appreciating its unique aspects while acknowledging its flaws. Initially, I was drawn in by the premise of a protagonist reincarnated into a world seemingly governed by otome game mechanics. The early chapters promised an intriguing story of loyalty, political intrigue,...
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Completed
6
#6 PICK
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
7
#7 PICK
Evil God Average
4.3
(776 ratings)
Genre: action, adventure, comedy
When she stands, she’s like a white peony. When she sits, she’s like a tree peony.
First Impressions
"Evil God Average" is definitely an interesting title, and after diving in, I can see why it's garnered so much attention. It’s a story about a high school girl who gets transported to another world and, thanks to a trickster god, ends up with the aura of an "average" evil god. The premise alone had me intrigued, and the execution... well, it's a mixed bag, but ultimately a fun ride. The initial chapters are a whirlwind of isekai tropes turned on their head. I was immediately drawn to the main character, Anri. She's not your typical overpowered protagonist seeking world domination. Instead, sh...
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Completed
8
#8 PICK
Rakuin no Monshou
4.4
(600 ratings)
Genre: action, adventure, drama
The countries of Mephius and Garbera have been waging a war for ten years and are trying to put an end to this long fight through a political marriage between the two royal families. Orba, who was driven from his home because of the war and was forced to become a gladiator, looks exactly like th...
First Impressions
"Rakuin no Monshou" has been quite the journey! Diving into this blend of action, adventure, and political intrigue has been a captivating experience, though not without its bumps. With its unique blend of strategy, character development, and a world teetering between fantasy and grounded realism, it's easy to see why many readers are drawn in. Initially, I was struck by the detailed world-building. The author doesn't hold back, immersing you in the history, politics, and culture of this world. Some might find it overwhelming at first, like being dropped into a history lesson, but I appreciate...
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Conclusion

Completion status is valuable information, but don't let it override quality concerns. A mediocre finished novel isn't better than an excellent ongoing one. Use completion as a tiebreaker between otherwise similar options.

Frequently Asked Questions

Our rankings combine reader ratings (40%), popularity metrics (25%), engagement data (20%), and editorial review (15%). We update rankings quarterly to reflect the latest reader sentiments.

The best action novels excel in their genre-specific elements while delivering compelling characters and plots. Reader satisfaction and re-readability are key factors in our selection.

Many Japanese novels on this list have quality translations available. We prioritize novels with accessible English versions while noting translation quality in our assessments.

We update our rankings quarterly throughout 2026 to incorporate new releases, changing reader preferences, and updated rating data.

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

The Lazy King

First Impressions

The Girl Who Ate a Death God

First Impressions

Kumo Desu ga, Nani ka?

First Impressions

Mushoku Tensei (WN)

First Impressions

Akuyaku Reijo Ni Koi Wo Shite

First Impressions

Apotheosis of a Demon – A Monster Evolution Story

First Impressions