kotori - Read Japanese Novels

Osamu Dazai, Soseki Natsume, Ryunosuke Akutagawa — a literary reader that beautifully displays approximately 18,000 works from Aozora Bunko in vertical text with ruby annotations. Completely free, no ads, no registration required.

■ Why Kotori?
You want to read literature in vertical text. You want to look up words while reading. You don't want to be interrupted by ads. Kotori makes all of that possible.

■ Key Features
· Vertical text display + ruby (furigana) support
Authentic vertical text rendering delivers a natural reading experience just like a printed book. With full ruby (furigana) support, even works filled with classical kanji are easy to read.

· Built-in offline dictionary (approx. 91,000 entries) — look up words instantly while reading
Search any word on the spot. With an offline Japanese dictionary containing approximately 91,000 entries, you can check meanings without any network connection.

· 4 themes (Light, Dark, Sepia, Aozora)
Mix and match four themes — Light, Dark, Sepia, and Aozora — with two font styles: Gothic and Mincho. Fine-tune text size for a comfortable, eye-friendly reading experience.

· Highlight & memo feature
Highlight and annotate passages that move you. Save phrases you want to revisit, color-coded for easy reference.

· Quick search by title or author
Search by title, author name, or reading to quickly find the work you're looking for. Download it and enjoy reading even where there's no signal.

■ Use it with confidence
· Completely free — no in-app purchases
· No ads — stay focused on reading
No ads or pop-ups of any kind. Every inch of the screen is a space just for you and the work.


Kotori is a small doorway into the treasure trove of Japanese literature. As an Aozora Bunko reader, it brings beautiful vertical text, an offline dictionary, and a comfortable reading environment together in one app. Why not dive into the world of literature with Kotori?