Furigana: Reading Aids Above Kanji
Furigana (振り仮名) are the small kana characters printed alongside a kanji to spell out its reading.1 For a learner, they are one of the most visible parts of Japanese typography: tiny hiragana floating over a manga page or a children's storybook, turning an unreadable character into a pronounceable word.
Overview
What furigana is in one paragraph
Furigana are smaller kana characters printed alongside kanji (or other base characters) to show pronunciation.1 In horizontal text, the kana sit above the base. In vertical text, they sit to the right.1
Two close synonyms appear in Japanese print and digital contexts: yomigana (読み仮名, "reading kana") and rubi (ルビ).1 Furigana is one specific use of "ruby text," the umbrella term used in typography and web standards for any small annotation set against a base.12
子供向けの本にはすべての漢字にふりがながついています。1
"In books for children, every kanji has furigana attached."
Furigana, rubi, ruby text, yomigana: the terms sorted
Four names refer to the same basic thing, but each has a different register. 振り仮名 (furigana) is the standard Japanese word in printing, publishing, and education.1 読み仮名 (yomigana, "reading kana") is a near-synonym favored in teaching and dictionaries, especially when the writer wants to contrast it with okurigana, the inflectional kana tail attached to a kanji root.1
ルビ (rubi) is the Japanese trade term, borrowed from the English printer's word "ruby."2 The same word was later borrowed back into English typography as "rubi," which is why the two spellings coexist in technical writing.
The English "ruby" predates the Japanese loan by more than a century. It originally named a British type size of 5.5 points used for interlinear annotations; American printers called the same size "agate," a term documented since 1831.2 The W3C Ruby Annotation Recommendation in 2001 standardized the spelling as "ruby" for HTML and XML markup, which is why the modern element is <ruby> rather than <rubi>.3
In Japanese editorial copy, the everyday word is 振り仮名 (furigana). ルビ is the workshop and DTP (desktop publishing) word, and it appears mainly in titles like NHK 新用字用語辞典 and in word-processor menus.1 "Ruby" in English typography is the wider category that furigana belongs to, not a synonym one can freely swap in.
A brief history and the 1946 inflection
Furigana was widespread in pre-war print. Summaries of Seeley's A History of Writing in Japan repeat one broad claim: the high kanji load in pre-war publications would have left much of the youth audience unable to read at all without furigana glosses.14
The turning point has a date. On 16 November 1946, the Ministry of Education released the Tōyō kanji list (当用漢字表) with 1,850 characters. The accompanying notice stated that "as a general rule, furigana should not be used" in official and journalistic prose.5 The goal was to push writers toward the restricted character set rather than keep using rare kanji propped up by kana glosses.
The Jōyō kanji list (常用漢字表) replaced Tōyō in 1981 with 1,945 characters; the 30 November 2010 cabinet revision expanded it to 2,136 characters, adding 196 and removing 5.67 The editorial convention that followed is partial furigana: kanji on the Jōyō list are written without glosses, and furigana is reserved for non-Jōyō kanji, irregular readings, and proper names.16
Furigana never left children's books, learner materials, or manga. The post-war claim that "furigana disappeared" applies to government documents and newspaper body text, not to Japanese print as a whole.1
Where furigana appears (and where it doesn't)
The editorial threshold is the single most useful idea a learner can take from this topic. Where furigana appears and where it disappears both follow rules. Those rules track the publisher's assumption about how many kanji the reader already knows.
Children's books and primary-school readers
Children's books in Japan commonly carry furigana on every kanji, a convention called sōrubi (総ルビ, "complete ruby").1 The convention exists because primary-school readers are graded against the Ministry of Education's grade-by-grade kanji list (教育漢字). That list distributes 1,026 characters across grades 1 through 6 within the Jōyō total of 2,136.6 Furigana bridges a story's age-appropriate vocabulary and the grade level at which each kanji is formally introduced: the word stays accessible even when the character has not been taught yet.
Shōnen and shōjo manga
Shōnen and shōjo manga tend to carry furigana on all non-numeric characters. Some titles drop it on elementary-grade kanji or very common words.1 Seinen and josei manga omit furigana most of the time, even on character names if those names are common. Some publishers still gloss the first mention of an important character's name.1
少年漫画では、ほとんどすべての漢字にふりがながふられている。1
"In shōnen manga, furigana is applied to almost every kanji."
The split reflects the target reader's expected kanji knowledge. Shōnen and shōjo titles aim at readers still inside the school-grade kanji curriculum. Seinen and josei titles aim at adults past it.16
Newspapers, novels, and adult prose
Newspapers and adult prose follow a partial-furigana convention tied to the Jōyō list. Kanji on the list usually appear without glosses. Furigana appears on non-Jōyō kanji, on Jōyō kanji used with a non-Jōyō reading, and on personal and place names whose reading is not obvious.16 The 1946 Tōyō notice's blanket rule, "as a general rule, furigana should not be used," is the direct ancestor of this convention. It was softened to allow furigana exactly where the bare-kanji rule would block the reader.5
新聞では常用漢字以外の漢字にふりがながつくのが普通だ。16
"In newspapers, kanji outside the Jōyō list normally take furigana."
A "first occurrence" convention sits on top of the threshold: when a non-Jōyō kanji or a name is glossed on first appearance, later appearances in the same article or chapter may appear without glosses.1 If you reach the second mention of a difficult name without a gloss, scan backward rather than assume the reading changed.
Learner materials and graded readers
Learner materials use furigana as graded training wheels: full furigana at N5 and N4, partial furigana at N3, and sparse or no furigana at N2 and N1.1 The convention mirrors children's-book grading but is tied to JLPT level rather than school grade. The JLPT defines its kanji set by frequency-and-utility bands rather than by ministry curriculum.16
Graded readers explicitly remove furigana stepwise as the volume number rises within a series.1 The removal is a pedagogical decision, not a typographic one: the publisher is deliberately raising the difficulty as the learner progresses.
Names, place names, and proper nouns
Personal names are often glossed with furigana on first appearance because Japanese names allow many irregular readings, including a class of name-only readings called nanori (名乗り).1 Furigana also appears alongside kanji names and their romanizations on railway-station signs, even when the kanji pronunciation is commonly known.1
駅名の漢字には、よく知られていてもふりがながつく。1
"Station-name kanji get furigana even when the reading is well known."
Foreign-name treatment differs by source language. Chinese names are usually pronounced with Japanese readings, and the pronunciation is written in hiragana. Korean names are usually pronounced with Korean readings, and the pronunciation is written in katakana.1 The kana script choice is itself information: hiragana signals a Japanese reading of the kanji, while katakana signals a foreign reading.
Ateji and gikun: when furigana is the reading, not the gloss
Ateji (当て字 or 宛字) are kanji used to represent native or borrowed words by sound, with less regard for the characters' meanings.8 Historical phonetic ateji include 倶楽部 (kurabu, "club"), 珈琲 (kōhī, "coffee"), and 亜米利加 (Amerika, "America," abbreviated to 米国 Beikoku in standard editorial usage).8 When ateji fall out of common reading, furigana is needed for readability. Many older ateji are now written in katakana instead (クラブ rather than 倶楽部).8
倶楽部 (クラブ)8
"Kurabu ('club'): the kanji are phonetic-only, and katakana furigana flags the foreign reading."
Gikun (義訓) are creative readings assigned to a character or compound that override the dictionary reading. With furigana, gikun can create a complex literary or poetic effect, especially when the readings contradict the kanji, or clarify a referent that might not be obvious.9 In manga, the device becomes a routine literary trick: the author writes one word in kanji (the "real" referent) and supplies furigana for a different word (the "spoken" referent), so the reader picks up both at once. Wikipedia's furigana article gives 悪夢 (nightmare) glossed しんじつ (truth), and 炎の雷 glossed ファイアボルト (Firebolt).1
悪夢 (しんじつ)1
"Nightmare glossed as truth: the kanji says one thing, the furigana says another; the reader gets both."
A meaning-rather-than-pronunciation variant called furikanji (振り漢字) reverses the relation: a base in kana is glossed with kanji for semantic specificity.1
Jukujikun (熟字訓) is the dictionary-grade cousin of gikun: a fixed, established reading at the compound level whose kana does not break down into individual kanji readings.9 Common examples include 今日 (kyō, "today"), 今朝 (kesa, "this morning"), 大人 (otona, "adult"), 煙草 (tabako, "tobacco"), and 麦酒 (bīru, "beer").9 Typographically, the furigana for jukujikun is often centered across the entire word, or for inflectional words across the entire root, because the reading attaches to the whole word.9
今日 (きょう)9
"Kyō ('today'): the kana does not break down character-by-character; this is the fixed jukujikun reading."
The three terms often blur together in learner materials. Ateji uses the kanji for sound and ignores meaning. Gikun uses an ad-hoc reading that overrides the dictionary entry for a literary effect. Jukujikun is a fixed compound reading that has earned dictionary status. Furigana is the typographic mechanism that makes all three legible.89
Full furigana, partial furigana, and the parenthetical alternative
Readers meet furigana in three editorial modes. Recognizing the mode tells you what assumption the publisher is making about your kanji knowledge.
Full furigana
Full furigana, sōrubi (総ルビ), means every kanji in the body text carries a kana reading above or beside it.1 Expected venues are children's books, primary-school readers, and most shōnen and shōjo manga.1
At the publication level, the convention is binary: a title either uses sōrubi throughout or it does not. Mid-paragraph switching is unusual. It signals that the kanji in question is being glossed for a specific reason, such as a non-Jōyō entry, a name, or a gikun.16
Partial furigana
Partial furigana is the standard for adult print: newspapers, novels, magazines, and academic prose. Furigana appears on non-Jōyō kanji, on Jōyō kanji given a non-Jōyō reading, and on names with non-obvious readings. Everything else appears without glosses.16 The Jōyō list functions as the editorial dividing line, giving publications that follow the convention a fixed rule for where furigana is added.67
Outlets that target a wide-age readership sometimes override the partial convention and add furigana to Jōyō kanji as well. The override is an accessibility decision rather than a stylebook one.1
Parenthetical readings as a furigana substitute
In plain-text contexts where ruby cannot render, such as email, social media, and chat, the standard substitute is to write the reading in parentheses after the kanji: 漢字(かんじ).1 The convention can be applied character-by-character (日(に)本(ほん)語(ご)) or word-by-word (日本語(にほんご)). The second is more common in casual prose. The first is reserved for cases where each kanji's reading is itself in question.1
The HTML <rp> element exists specifically to replicate this convention as a fallback for legacy renderers. A <ruby> block can then degrade to "漢字(かんじ)" in browsers that do not render ruby.10
Vertical vs. horizontal layout
The visual layout of Japanese text changes where furigana sits. If you have only met Japanese on the web, you are probably used to horizontal placement. The vertical placement can look unfamiliar at first, but it is the dominant form in print novels and newspapers.
Horizontal text: furigana above
Yokogaki (横書き) is left-to-right horizontal writing. Furigana is placed above the line of base text.111 Yokogaki became part of Japanese typography during the Meiji era, when Japanese began printing Western-language dictionaries. It is now the standard for web, scientific, and reference materials.11 HTML and the W3C <ruby> model assume yokogaki by default and place <rt> above the base in left-to-right contexts.103
Vertical text: furigana to the right
Tategaki (縦書き) is top-to-bottom, right-to-left writing. Furigana is placed to the right of the line of base text.11112 Tategaki is still common in Japan in novels, newspapers, and magazines, including most Japanese comics.11 The same <ruby> element handles tategaki rendering when the surrounding layout is vertical. The positioning follows the direction of the main text rather than a fixed "above" rule.1112
Mono-ruby, jukugo-ruby, and group-ruby
Three positioning modes describe how the ruby string is distributed across its base. The choice is partly a typographic convention and partly a result of whether the reading breaks down character-by-character.
| Mode | Japanese | How the reading maps | Typical use |
|---|---|---|---|
| Mono-ruby | モノルビ | One ruby string per base character, centered over it | Per-character on'yomi or kun'yomi readings12 |
| Jukugo-ruby | 熟語ルビ | Per-character readings line up under a compound, with extra space at the joints | Compound (jukugo) where each kanji still has its own reading12 |
| Group-ruby | グループルビ | The whole reading is centered across the entire base run with no per-character mapping | Jukujikun and gikun, where no per-character split exists129 |
The W3C JLReq Note names two spacing distributions used inside these modes: "1-2-1 (JIS)," which adds spaces at the start and end of the shorter string and between its component characters, and "0-1-0," which adds equal spaces only between the component characters.1 Group-ruby is more common for jukujikun, since many Japanese words have unique pronunciations unrelated to the readings of the characters they are written with.1
漢字 (かんじ): mono-ruby, where 漢 ↔ かん and 字 ↔ じ.12
"'Kanji' set as mono-ruby: each character has its own reading directly above."
今日 (きょう): group-ruby, where きょう spans 今日 with no per-character split.19
"'Today' set as group-ruby: the kana belongs to the compound, not to either kanji individually."
Furigana in digital text: a brief note on Unicode and HTML
Furigana on the web is one specific application of a general typography model that the W3C and WHATWG built into HTML. You do not need to write markup to read Japanese on the web, but recognizing the element names makes the source view of a Japanese page easier to understand.
The Unicode "ruby" name and the printer's-type origin
"Ruby" as a typographic term was the name for a British type size of 5.5 points used for interlinear annotations; the equivalent American size was called "agate" and is documented since 1831.2 The W3C Ruby Annotation Recommendation in May 2001 standardized "ruby" rather than "rubi" for markup. Although the Japanese term ルビ would back-romanize as "rubi," the spelling was set to match existing English typographic vocabulary.23
Unicode provides interlinear-annotation control characters (U+FFF9 ANNOTATION ANCHOR, U+FFFA ANNOTATION SEPARATOR, U+FFFB ANNOTATION TERMINATOR) for internal data interchange. These characters are not meant to be shown to users, and they are not the markup learners encounter on the page.2
The <ruby>, <rt>, and <rp> elements at a glance
<ruby> marks one or more spans of phrasing content with ruby annotations. It wraps the base text and one or more <rt> elements, with optional <rp> elements.10 <rt> marks the ruby text component of a ruby annotation and carries the reading.10 <rp> provides parentheses or other content around a ruby text component, for user agents that do not support ruby annotations.10
The HTML Living Standard's reference fallback example shows the three-element pattern in compact form: <ruby>漢<rp>（</rp><rt>かん</rt><rp>）</rp></ruby> renders as "漢" with "かん" above it in supporting browsers, and as "漢（かん）" in non-supporting ones.10 The W3C Ruby Annotation Recommendation in 2001 introduced the model. HTML5 incorporated <ruby>, <rt>, and <rp> into the main specification, and they are now part of the WHATWG HTML Living Standard.103
Good to know
Furigana reflects an editor's call, not always the dictionary reading
Editors place furigana to help the reader, but in manga and literary contexts the furigana may be a gikun deliberately at odds with the kanji's dictionary reading.19 If you memorize a kanji-reading pair from a manga panel without checking a dictionary, you may have memorized an author's stylistic overlay rather than the word's standard pronunciation. The fix is simple: when a reading from a manga or novel feels unexpected, look it up.
The full-furigana habit can stall kanji recognition
Reading only sōrubi shōnen manga indefinitely is a common way for an intermediate learner's kanji recognition to plateau. Full furigana lets the eye skip the kanji entirely and read the kana, so the kanji never has to be identified by shape.16
The practical workaround is to move to partial-furigana titles, such as seinen manga or JLPT-graded readers, once the school-grade kanji are familiar. The Jōyō-list editorial convention makes the seinen-and-up tier a graded reading curriculum in disguise: by glossing only the difficult kanji, partial furigana forces recognition on everything else.
常用漢字に慣れたら、ふりがなの少ない本に進もう。1
"Once you are comfortable with the Jōyō kanji, move on to books with less furigana."
Why some loanword kanji carry katakana furigana
Ateji like 倶楽部 (クラブ) and Chinese place names use katakana ruby to signal that the reading is foreign or non-kun.18 The katakana choice is itself information: before sounding it out, the reader knows that the reading will not be a regular on'yomi or kun'yomi. If you see hiragana furigana on a kanji compound, expect a Japanese reading. Katakana furigana flags the opposite.
The 1946 Tōyō reform shrank furigana's job, not its existence
The 1946 Tōyō kanji document's general rule, "as a general rule, furigana should not be used," applied to government documents and newspaper body text.5 It did not apply to children's books, learner materials, or manga, all of which kept furigana throughout.1 The post-war claim that "furigana disappeared" is half-true at best. The rule dates to 16 November 1946, and the partial-furigana convention that succeeded it is its direct descendant, softened by the 1981 and 2010 Jōyō revisions.657
A mnemonic for layout: furigana follows the reader's eye
In yokogaki, the kana sits above the base. In tategaki, the kana sits to the right of the base.1112 One way to remember which side: furigana follows the direction the reader's eye is already moving, so it never crosses the reading path. In horizontal text, the eye tracks sideways and looks upward for the gloss. In vertical text, the eye tracks downward and looks rightward for the gloss.
See also
- Japanese Punctuation and Typographic Conventions
- How Many Kanji Do You Need? A Realistic Count
- Hiragana, Katakana, or Kanji First? A Beginner's Script Order