Kotori is a free iOS app for finding Aozora Bunko works, reading with a dictionary at hand, and keeping the passages that stay with you.
カムパネルラが手をあげました。
Meet the classics of Aozora Bunko in beautiful vertical text
Kotori is a free iOS app for finding Aozora Bunko works, reading with a dictionary at hand, and keeping the passages that stay with you.

Kotori
Aozora Bunko, in vertical text.
- Free
- No ads
- No account
- Works offline
- iCloud sync
- iPad ready
Start reading in 3 steps
Search, read, and go deeper.
Search

Find works by title, author, or genre instantly.
Read

Enjoy beautiful vertical text with furigana and customizable themes.
Go deeper

Look up words and highlight passages.
Try reading
Atsushi Nakajima, The Moon over the Mountain (山月記), first paragraph from Aozora Bunko
隴西の李徴は才穎、天宝の末年、若くして名を虎榜に連ね、ついで江南尉に補せられたが、性、、自ら恃むところ頗る厚く、賤吏に甘んずるを潔しとしなかった。いくばくもなく官を退いた後は、故山、獠略に帰臥し、人と交を絶って、ひたすら詩作に耽った。下吏となって長く膝を俗悪な大官の前に屈するよりは、詩家としての名を死後百年に遺そうとしたのである。しかし、文名は容易に揚らず、生活は日を逐うて苦しくなる。李徴は漸くに駆られて来た。この頃からその容貌も峭刻となり、肉落ち骨秀で、眼光のみ徒らにとして、曾て進士に登第した頃の豊頬の美少年の俤は、何処に求めようもない。数年の後、貧窮に堪えず、妻子の衣食のために遂に節を屈して、再び東へ赴き、一地方官吏の職を奉ずることになった。一方、これは、己の詩業に半ば絶望したためでもある。曾ての同輩は既に遥か高位に進み、彼が昔、鈍物として歯牙にもかけなかったその連中の下命を拝さねばならぬことが、往年の儁才李徴の自尊心を如何に傷けたかは、想像に難くない。彼は怏々として楽しまず、狂悖の性は愈々抑え難くなった。一年の後、公用で旅に出、汝水のほとりに宿った時、遂に発狂した。或夜半、急に顔色を変えて寝床から起上ると、何か訳の分らぬことを叫びつつそのまま下にとび下りて、闇の中へ駈出した。彼は二度と戻って来なかった。附近の山野を捜索しても、何の手掛りもない。その後李徴がどうなったかを知る者は、誰もなかった。
Tap a dotted word to look it up, or select text to highlight it.
Where to begin
The shelf
This week's pick: Botchan. Read the introduction →Words from our readers
「小説が読みやすくて、良いと思いました。」The novels are easy to read, and I think the app is good.
「読みやすいので気に入りました。アイコンもかわいい。」I like how easy it is to read. The icon is cute, too.
「字も大きくできるし、カフェでランチしながら読んだことのない短編など読むのにちょうどよいし、よい時間となります」I can make the text bigger, and it’s just right for reading short stories that are new to me over lunch at a café. It’s a good way to spend some time.
Excerpts from reviews posted on the App Store. Translated from Japanese.
Using Kotori
Questions
- What is Aozora Bunko?
- Aozora Bunko is a digital library of Japanese literature whose copyrights have expired. You can read classics by authors like Natsume Soseki, Ryunosuke Akutagawa, and Kenji Miyazawa.
- Is the app free?
- Yes, Kotori is completely free to use with no ads.
- Can I read offline?
- Yes, once you download a book, you can read it offline.
- Where is my data stored?
- Reading history, highlights, notes, and other reading data are stored on your device. If you turn on iCloud sync in Settings, your bookshelf, highlights, and notes sync between iPhone and iPad through your iCloud. Syncing requires you to be signed in to iCloud, but there’s no Kotori account to create. Only anonymous usage analytics used to improve the app are sent to TelemetryDeck as described in the Privacy Policy.
- Can I sync my bookshelf, highlights, and notes between iPhone and iPad?
- Yes. Starting with version 2.4.0, you can sync your bookshelf (favorites, in progress, and finished) and your highlights and notes between iPhone and iPad with iCloud. Just turn it on in the app’s Settings. Syncing requires you to be signed in to iCloud, but there’s no Kotori account to create. Text size and theme stay per device.
Screen colors
Four themes
- Light
- Dark
- Sepia
- Sky
Changelog
Latest version
Sync between iPhone and iPad
- Sync your reading records between iPhone and iPad with iCloud. Turn it on in Settings.
- A layout made for the larger iPad screen, with page turning from a keyboard.
- Smoother page turning.
Japanese literary classics, in the palm of your hand.
Free, no ads, works offline







