Oricon (Japanese research organization) released its weekly Light Novel ranking for the week of Dec 26 2025.
※The English titles of works may not always be accurate as some have not been released overseas. Thank you for your understanding.

Related rankings are compiled here
Oricon Comic Ranking Summary

3rd place: Kirby and the Great Underground Adventure!

Kirby embarks on a grand adventure deep underground!

King Dedede kicks off the "Mega Ton Punch Contest," where the strongest fist in Dream Land is decided by smashing rocks barehanded. But things go too far when Dedede accidentally punches open a massive hole—and falls right into it!

To save him, Kirby, Bandana Waddle Dee, and the ever-knowledgeable Wise Waddle Dee set off into the unknown depths of the earth. Meanwhile, Meta Knight also heads underground alone, driven by a secret mission…

A thrilling adventure begins as they face powerful enemies lurking in the underground world!

2nd place: That Time I Got Reincarnated as a Slime 23

With Rimuru’s return, the forces of Tempest are filled with renewed determination.

In the midst of this, Rimuru receives shocking news from Velzard—
information that could fundamentally overturn the nature of the entire conflict.

Meanwhile, Ivarage begins to make troubling moves of his own, plunging the situation further into chaos.

A true all-out war.
As everyone is pushed to their limits, the fate of all rests upon a single slime.

The immensely popular reincarnation fantasy finally reaches its main-story conclusion!

1st place: Novel: Frieren: Beyond Journey's End - Prelude 2

A tale of untold days before the journey, featuring characters like Ubel and Serie.

Coinciding with the second season of the TV anime starting in January 2026, this second volume of the Prelude novel series is supervised by original creator Kaneto Yamada.
This collection features five short stories exploring previously unrevealed episodes:

Ubel's mysterious past

The elven village where Frieren was born

Everyday life within the Continental Magic Association

The days Serie spent living with Flamme
…and more insights that never appeared in the main storyline.

A must-read for fans seeking a deeper dive into the world and characters of Frieren: Beyond Journey’s End.

Related rankings are compiled here
Oricon Comic Ranking Summary

Ranking / Estimated number of copies sold / Estimated cumulative sales volume / Title / Author

1 24,081 24,081 Novel: Frieren: Beyond Journey's End - Prelude 2 (Mei, Yatsume (Author)) / (Yamada, Kaneto (Original)) / (Abe, Tsukasa (Illustrations))
2 6,619 104,668 That Time I Got Reincarnated as a Slime 23 (Fuse (Author)) / (Mitz Vah (Illustrator))
3 5,454 13,105 Kirby's Great Underground Adventure! (Takase, Mie (Story)) / (Karino, Tau & Poto (Illustrations))
4 4,137 99,986 Novel: Frieren: Beyond Journey's End - Prelude (Mei, Yatsume (Author)) / (Yamada, Kaneto (Original)) / (Abe, Tsukasa (Illustrations))
5 3,754 50,492 That Time I Got Reincarnated as a Slime: Side Story - How to Spend a Certain Vacation (Fuse (Author)) / (Mitz Vah (Illustrator))
6 2,541 21,903 I Joined a Group I'm Not Friends With on a School Trip 2 Kinugasa, Uzura
7 2,514 42,536 I Joined a Group I'm Not Friends With on a School Trip Kinugasa, Uzura
8 2,360 69,507 Classroom of the Elite: Year 3 Arc 3 (Kinugasa, Shougo (Author)) / (Tomose, Shunsaku (Illustrator))
9 2,344 27,061 Neighbor Alya, Who Sometimes Mutteringly Dere-ifies in Russian 11 SanSan SUN (Author) / Momoko (Illustrator)
10 2,263 12,337 Death March to the Parallel World Rhapsody 34 Ainanami, Hiro (Author) / shri (Cover Art) / Nagahama, Megumi (Illustrations)

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