Read Japanese; your reading clears your reviews.
A dictionary and spaced repetition built into the book. Tap a word to learn it; every page you read after that is the review.
THE READER
A page, and almost nothing else.
Vertical or horizontal, three furigana modes. At rest there is the page, one hairline for how far in you are, and the way out.
はで。は。でたかとがぬ。
でもたでてただけはて。
はでてとをた。でとはとでなでただ。
REVIEWS
Most of your reviews happen while you read.
A word you carded turns up again forty pages on. That counts as the review; what the book did not bring back is a short queue.
吾輩はここで始めて人間というものを見た。しかも後で聞くとそれは書生という人間中で一番獰悪な種族であったそうだ。この書生というのは時々我々を捕えて煮て食うという話である。
書生
しょせい
a student boarding in someone’s house
Not taken on trust: Yomu spot-checks a few of its own credits with a quick question as you read, and takes back any that fail.
TODAY
Your words turn up in the morning’s news.
Short news pieces arrive through the day; when one uses a word you carded, Today shows it beside the headline, and the article is a page you can read.
in today’s news
警戒けいかい
vigilance; caution; being watchful
九州南部で線状降水帯 気象庁「記録的な大雨に警戒を」
carded yesterday · not asked yet · met once while reading
BOOKS
What can I read next?
Every band below is arithmetic you can open — how much of the page is kanji, how long the sentences run, how far past the common words the vocabulary reaches. Signed in, your own share of each book sits on its row: the words you have marked known, counted against the book, not a guess at a vocabulary size.
- 奥州における御館藤原氏喜田貞吉Rare kanji17,013 characters · 2,103 distinct words
How this is counted
Many of the kanji are outside the common 常用漢字 set, and the sentences run long. Slow going even with a big vocabulary.
- How much of the page is kanji48% of the script on the page · 24% of this band
- How long the sentences run46 characters per sentence · 20% of this band
- How late those kanji are taught4 on a 1–8 scale of school year, where 7 is the rest of the common list and 8 is outside it · 24% of this band
- Kanji outside the common list15% of the distinct kanji · 12% of this band
- How often the words are uncommon19% of the words the corpus ranked sit past the common bands, counting the middle bands as half · 19% of this band
Its 1,135 different kanji, by when they are taught
- 58%
- Taught in primary school — the 教育漢字.
- 27%
- Taught later at school — the rest of 常用漢字.
- 15%
- Not on the common list — name characters, and characters outside 常用漢字 altogether.
Counted over the 1,135 different characters the book uses, each once — not over how often you meet them, so a character used once weighs the same as one used on every page. The five bars higher up count kanji two different ways: “How late those kanji are taught” counts every appearance, so the characters on every page weigh most, while “Kanji outside the common list” is the last figure in this chart, counted the same each-character-once way. The published list placed 93% of those 1,135 characters. The rest are counted as outside 常用漢字, which is what absence means in a complete list — so the smaller that figure, the more of this chart is the list's gaps rather than the book's.
Counted over 15,752 characters of Japanese script and 9,978 words as they appear on the page, of which 4,983 appear in the frequency list behind this. The rest are not counted rather than rare: the list only reaches so far.
Tatoeba Japanese sentence export (tatoeba-jpn): 32980 lexemes over 2497247 counted words. Short, learner-contributed conversational sentences, largely translated from English. Not prose.
Which kanji it uses was judged against a published list of 2,999 characters and the school year each one is taught in. “The common list” above is 常用漢字, the characters Japanese schooling covers; a character the list places outside those school years — a name character, or one it does not carry at all — counts as outside it. “How late those kanji are taught” counts every time a character appears, so the characters on every page weigh most; “Kanji outside the common list” counts each different character once, however often the book uses it.
- 雪の透く袖鈴木鼓村Rare kanji3,151 characters · 582 distinct words
How this is counted
Many of the kanji are outside the common 常用漢字 set, and the sentences run long. Slow going even with a big vocabulary.
- How much of the page is kanji41% of the script on the page · 24% of this band
- How long the sentences run138 characters per sentence · 20% of this band
- How late those kanji are taught3.8 on a 1–8 scale of school year, where 7 is the rest of the common list and 8 is outside it · 24% of this band
- Kanji outside the common list11% of the distinct kanji · 12% of this band
- How often the words are uncommon13% of the words the corpus ranked sit past the common bands, counting the middle bands as half · 21% of this band
Its 501 different kanji, by when they are taught
- 67%
- Taught in primary school — the 教育漢字.
- 22%
- Taught later at school — the rest of 常用漢字.
- 11%
- Not on the common list — name characters, and characters outside 常用漢字 altogether.
Counted over the 501 different characters the book uses, each once — not over how often you meet them, so a character used once weighs the same as one used on every page. The five bars higher up count kanji two different ways: “How late those kanji are taught” counts every appearance, so the characters on every page weigh most, while “Kanji outside the common list” is the last figure in this chart, counted the same each-character-once way. The published list placed 95% of those 501 characters. The rest are counted as outside 常用漢字, which is what absence means in a complete list — so the smaller that figure, the more of this chart is the list's gaps rather than the book's.
Counted over 2,893 characters of Japanese script and 1,825 words as they appear on the page, of which 1,002 appear in the frequency list behind this. The rest are not counted rather than rare: the list only reaches so far.
Tatoeba Japanese sentence export (tatoeba-jpn): 32980 lexemes over 2497247 counted words. Short, learner-contributed conversational sentences, largely translated from English. Not prose.
Which kanji it uses was judged against a published list of 2,999 characters and the school year each one is taught in. “The common list” above is 常用漢字, the characters Japanese schooling covers; a character the list places outside those school years — a name character, or one it does not carry at all — counts as outside it. “How late those kanji are taught” counts every time a character appears, so the characters on every page weigh most; “Kanji outside the common list” counts each different character once, however often the book uses it.
- 死生幸徳秋水Rare kanji9,648 characters · 1,322 distinct words
How this is counted
Many of the kanji are outside the common 常用漢字 set, and the sentences run long. Slow going even with a big vocabulary.
- How much of the page is kanji46% of the script on the page · 24% of this band
- How long the sentences run121 characters per sentence · 20% of this band
- How late those kanji are taught4.2 on a 1–8 scale of school year, where 7 is the rest of the common list and 8 is outside it · 24% of this band
- Kanji outside the common list12% of the distinct kanji · 12% of this band
- How often the words are uncommon12% of the words the corpus ranked sit past the common bands, counting the middle bands as half · 21% of this band
Its 910 different kanji, by when they are taught
- 62%
- Taught in primary school — the 教育漢字.
- 26%
- Taught later at school — the rest of 常用漢字.
- 12%
- Not on the common list — name characters, and characters outside 常用漢字 altogether.
Counted over the 910 different characters the book uses, each once — not over how often you meet them, so a character used once weighs the same as one used on every page. The five bars higher up count kanji two different ways: “How late those kanji are taught” counts every appearance, so the characters on every page weigh most, while “Kanji outside the common list” is the last figure in this chart, counted the same each-character-once way. The published list placed 94% of those 910 characters. The rest are counted as outside 常用漢字, which is what absence means in a complete list — so the smaller that figure, the more of this chart is the list's gaps rather than the book's.
Counted over 8,956 characters of Japanese script and 5,966 words as they appear on the page, of which 3,470 appear in the frequency list behind this. The rest are not counted rather than rare: the list only reaches so far.
Tatoeba Japanese sentence export (tatoeba-jpn): 32980 lexemes over 2497247 counted words. Short, learner-contributed conversational sentences, largely translated from English. Not prose.
Which kanji it uses was judged against a published list of 2,999 characters and the school year each one is taught in. “The common list” above is 常用漢字, the characters Japanese schooling covers; a character the list places outside those school years — a name character, or one it does not carry at all — counts as outside it. “How late those kanji are taught” counts every time a character appears, so the characters on every page weigh most; “Kanji outside the common list” counts each different character once, however often the book uses it.
Sign in to see how much of each book you already know. Coverage is computed against your own known words, and no figure here describes anybody else.
BRING YOUR OWN
Your book, and the words you already know.
Drop in an EPUB or paste a chapter. Bring your vocabulary across from Anki, jpdb or WaniKani and what you already know comes with it, so nothing starts from zero.
bring your words from
- Anki
- .apkg or .colpkg · interval, ease and history come with it
- jpdb
- reviews.json · intervals rebuilt from your review history
- WaniKani
- a read-only access token
- a list
- one word per line