Atamadaka (頭高): The Head-High Japanese Pitch-Accent Pattern
Atamadaka pitch accent is the Tokyo-standard pattern where a word's single H→L drop falls immediately after the first mora. This gives the head-high HLLL… contour that defines accent 1.123 It is the only Tokyo pattern whose drop position is locked to a fixed mora. It is also the only one whose first mora is high rather than low, which makes atamadaka the easiest pattern for a learner's ear to catch.13
Overview
Atamadaka is one of the four pitch-accent patterns that organise the Tokyo-standard pronunciation of Japanese nouns. The others are heiban (unaccented), nakadaka (medial accent), and odaka (final accent).13 Heiban dominates the native multi-mora noun inventory, but atamadaka anchors the short end of the lexicon: many of the highest-frequency one-mora and two-mora native nouns a learner meets in the first months of study are accent 1.14
This article defines the term, derives the HLLL… contour from the same culminativity and initial-rise rules that govern the other three patterns, walks through the particle-attachment test, explains why short native nouns skew atamadaka, and works three canonical examples: いのち, 雨, and the deliberately tricky にほん.
What "atamadaka" (頭高) literally names
The compound 頭高 fuses 頭 (atama, "head") with 高 (taka(i), "high"), and rendaku voices the second element from /taka/ to /daka/.23 The full term is 頭高型 (atamadaka-gata, "head-high type"); 頭高式 (atamadaka-shiki) is a recognised synonym.2
In Western phonology, the same pattern often appears under the labels "initially-accented" or "initial accent." Kawahara's 2015 chapter defines an accented word as one bearing "an abrupt H(igh)-L(ow) fall in F0," and treats initially-accented words as the case where that fall sits between mora 1 and mora 2.1 sci.lang.japan calls it "the falling type, atamadakagata (頭高型)" and gives the contour as "the first mora is high and the succeeding ones are all low."5
One-line definition
Atamadaka is the pitch pattern in which the H→L drop falls immediately after mora 1, so mora 1 is H, every later mora is L, and any attached particle is L.235
Wikipedia's per-mora schema makes the recipe concrete: "HꜜL, HꜜL-L, HꜜL-L-L, HꜜL-L-L-L, etc."3 The L on mora 2 in a two-mora word extends into the entire L tail in longer words.
Where atamadaka fits among the four Tokyo patterns
Tokyo-standard accent assigns one of four patterns to every noun-length unit. Atamadaka is the initial-accent member of the set. The others are nakadaka (drop after some medial mora), odaka (drop after the final mora, audible only on an attached particle), and heiban (no drop at all).13
Two structural facts make atamadaka unique within this set. First, its drop position is fixed: every atamadaka word drops after mora 1, by definition.1 Second, atamadaka is the only pattern that blocks the Tokyo initial-rise rule, which otherwise places an L on mora 1 of every word. The lexical accent on mora 1 removes the environment the rule needs to apply.13
The four-pattern grid is treated in depth on the pitch-accent overview article; this article handles only the highlighted box.
How atamadaka sounds: the HL(L...L) contour
The initial high mora
In an atamadaka word, mora 1 is H. This is the only pattern in which mora 1 is not L, and the reason is mechanical rather than stylistic.
Kawahara's derivation of the Tokyo contour notes that "the first two syllables in a word bear a LH tonal sequence, sometimes known as initial lowering or initial rise, unless the first syllable is accented."1 Atamadaka is exactly that "unless": mora 1 carries the lexical accent, so the L-on-mora-1 rule has no environment in which to apply. Wikipedia states the same exclusion from the other direction: initial lowering applies in "non-atamadaka" words.3
The drop between mora 1 and mora 2
The H→L transition between mora 1 and mora 2 is the lexical accent itself, not a separate feature added on top. Kawahara, p. 447: "an accented vowel is assigned a High tone followed by a Low tone on the following vowel, resulting in an abrupt H(igh)-L(ow) fall in F0."1
For atamadaka, the "accented vowel" is mora 1 and the "following vowel" is mora 2, so the fall sits between them. Wikipedia describes what listeners hear: "the pitch starts high, drops suddenly on the second mora, then levels out."3 The phrase "drops suddenly" is the cue an L1-English listener should be trained to hear: a discrete step down, not a slide.
The low tail
After the drop, every subsequent mora is L by tonal spreading. Kawahara's rule is that "tonally-unspecified syllables get their tonal specifications by copying the tone from the rightmost specified syllable."1 Once mora 2 is L by direct assignment, that L copies rightward to the word edge and onward across any attached particle. Mora count does not matter: a four-mora atamadaka word and a seven-mora atamadaka word share the same shape, just with a longer tail.
One-mora atamadaka words
A one-mora atamadaka word, such as 木 (ki, "tree"), 火 (hi, "fire"), 目 (me, "eye"), or 手 (te, "hand"), is conventionally tagged accent 1. But in citation form, it sounds the same as a one-mora heiban word. The H→L fall has nowhere to land.
Kawahara, p. 451, states the situation directly: monomoraic accented and unaccented words "are phonetically very similar, if not identical, when they appear in isolation."16 The distinction surfaces only on a following particle, where atamadaka takes L and heiban takes H. This makes the particle test the practical check for any one-mora noun. It is also the home territory of the pitch-accent minimal-pairs article.
What atamadaka is NOT
Atamadaka is not English first-syllable stress. English stress bundles loudness, pitch, and vowel duration onto one syllable. Atamadaka touches only F0, the acoustic measure of pitch. Mora 1 is H, but it is not long and not loud; the only acoustic difference between mora 1 and mora 2 is pitch height.1 The wider contrast between Japanese pitch accent and English stress is treated on the Japanese stress vs. pitch article.
Atamadaka is also not a falling tone over a single syllable. The fall is a discrete step between two successive morae, not a glide within one mora. NHK 2016's "\" mark and Wikipedia's "Hꜜ" mark both flag the boundary between morae, not a within-mora contour.73
Finally, atamadaka is not restricted to two-mora words. It is defined by drop position, and the same recipe (H on mora 1, L on every later mora) applies at every length from one to many.23
The accent-1 label
Why atamadaka is numbered 1
The dictionary integer that accompanies a Japanese noun names the mora after which the H→L drop occurs.23 Heiban words are tagged 0 because there is no drop. Nakadaka and odaka words are tagged with their actual drop positions. Atamadaka drops after mora 1, so the integer is exactly 1, and every atamadaka word is accent 1, by definition.23
The equivalence works both ways. A word tagged [1] in a reputable dictionary is atamadaka. A word identified as atamadaka by ear or by contour is [1] in the dictionary.
How atamadaka appears in OJAD, Jisho, and NHK
OJAD (the Online Japanese Accent Dictionary), hosted by the Minematsu and Saito Laboratories at the University of Tokyo, tags atamadaka entries with the integer 1. Its Suzuki-kun prosody tutor renders the contour as a high step on mora 1 followed by a flat L plateau across every later mora.8
NHK 2016, the broadcaster's reference pronunciation dictionary with roughly 75,000 entries, marks the drop point with "\" placed immediately after the accented mora.7 In an atamadaka entry, that mark sits between mora 1 and mora 2, and the entry is tagged with the accent integer 1.
Jisho and the Yomitan browser dictionary surface accent integers downstream from these primary references; both tag atamadaka entries [1]. The pitch-accent notation article goes deeper on what each tool draws and why.
Reading an atamadaka diagram back into morae
The decoding recipe for any atamadaka entry is fixed, and it is the exact inverse of the heiban recipe for the same mora count: mora 1 → H, every later mora → L, the following particle → L.13 The recipe holds at every length: one-mora (H, particle L), two-mora (HL, particle L), three-mora (HLL, particle L), four-mora (HLLL, particle L), and so on.3
Behaviour under particle attachment: the particle stays low
The "particle joins the low tail" rule
Particles that attach to an atamadaka word, such as が, は, を, の, に, and で, are themselves L. The L tail that begins on mora 2 continues across the word boundary onto the particle by the same tonal-spreading mechanism that produced the tail in the first place.1
Wikipedia frames the rule symmetrically against the heiban case: "This high pitch spreads to unaccented grammatical particles that attach to the end of the word, whereas these would have a low pitch when attached to an accented word."3 Atamadaka is the "accented" branch of that disjunction: the L spreads, not the H.
Why atamadaka is unambiguous from the first two morae
Atamadaka is the only Tokyo pattern whose contour begins HL rather than LH. Heiban, nakadaka, and odaka all begin with the LH initial rise.13 By the time mora 2 lands, an attentive listener already knows the pattern. The contour has declared itself before any particle is reached.
This is the practical asymmetry between atamadaka and the heiban/odaka pair: heiban and odaka are confusable in isolation and must be disambiguated by a particle, while atamadaka announces itself within the word.
The が-attachment audit, repeated
The が-test used to distinguish heiban from odaka still applies to atamadaka, but as a consistency check rather than a discovery procedure: an atamadaka word plus が yields H L L … L L, with が unambiguously L.13
A side-by-side contrast against heiban makes the audit visible:
| Pattern | Word | Per-mora pitch | With が |
|---|---|---|---|
| Heiban (accent 0) | 友達 (tomodachi) | と(L) も(H) だ(H) ち(H) | ともだちが L H H H H |
| Atamadaka (accent 1) | 命 (inochi) | い(H) の(L) ち(L) | いのちが H L L L |
OJAD's Suzuki-kun shows the contrast visually: the heiban contour plus particle is an unbroken H plateau after the initial rise. The atamadaka contour plus particle is a step down between mora 1 and mora 2 followed by a flat L extending across the particle.8
Limits of the test
For multi-mora atamadaka words, the test confirms what the contour already revealed. The H→L step inside the word has declared the pattern before が is reached.13
For one-mora atamadaka words, the test is the only way to make the [1] tag audible, because the form in isolation sounds the same as a one-mora heiban.16 On 木 (ki, [1]), 木が is H L. On a one-mora heiban homophone, the same particle would surface as H. That single particle is the entire audible difference between the two readings. The dedicated minimal-pairs article will drill this contrast in full.
Why atamadaka is over-represented among monosyllabic and disyllabic native words
The default-accent landscape
The aggregate corpus split in Kubozono 2008, as reported in Kawahara's chapter, is heavily skewed toward heiban for native vocabulary.14 Among N = 2,220 native nouns, 71 percent are unaccented (heiban). Among N = 4,939 Sino-Japanese nouns, 51 percent are unaccented. Among N = 778 loanwords, only 7 percent are unaccented.14
The picture for atamadaka in this aggregate is unsurprising: atamadaka is one of three accented patterns sharing the non-heiban remainder. On the whole-vocabulary scale, it is a meaningful but smaller slice. The over-representation claim this article makes is not about the whole vocabulary. It is about a specific length-stratified slot.
One-mora native nouns lean atamadaka
A one-mora native noun has exactly two phonological options: accented or unaccented. The accented case is, by definition, atamadaka. Drop after mora 1 is the only place a drop can go, because there is no later mora.13
High-frequency one-mora native nouns that surface as accent 1 in NHK 2016 and OJAD include 木 (ki, "tree"), 火 (hi, "fire"), 目 (me, "eye"), and 手 (te, "hand").78 None of these contrast audibly with their heiban siblings in isolation. The particle test (木が, きが, H L) is the practical check for each one.
Two-mora native nouns frequently atamadaka
A two-mora accented native noun can be atamadaka (drop after mora 1) or odaka (drop after mora 2). Nakadaka cannot exist for two-mora words because the drop would have to land strictly inside the word. The only available position between morae is the one that defines odaka.13
Of the two options, atamadaka is easier to distinguish in continuous speech, because its HL contour declares itself within the word rather than waiting for a particle. Many high-frequency two-mora native nouns surface as atamadaka in Tokyo standard: 雨 (ame, "rain"), 海 (umi, "sea"), 朝 (asa, "morning"). sci.lang.japan cites umi explicitly as HL under atamadakagata.5
How early-position drops carry lexical information
The drop after mora 1 is the earliest information in the word, so it discriminates faster than any later drop. This is the prosodic basis for the high information value of atamadaka in short, high-frequency native vocabulary. It matches Kawahara's observation (p. 451) that finally-accented and unaccented words are confusable in isolation while initially-accented ones are not.1
The structural pressure is straightforward: when there are only one or two morae to work with, "drop early" is the clearest move available.
Implication for guessing
For a short native noun whose accent is unknown, heiban is the most likely starting guess (around 71 percent in the native-noun corpus). If the noun is accented, atamadaka becomes much more likely in the one-mora and two-mora slot, because most other accent positions are structurally unavailable.14
For a short, unfamiliar native noun, the practical rule is: guess heiban first, atamadaka second, and always look it up. The guessing order is a hedge against the worst-case mistake, not a substitute for the dictionary.
Worked examples
いのち (inochi, 1)
命 (いのち) is a three-mora native noun meaning "life," conventionally tagged accent 1 in NHK 2016 and OJAD.78 Per-mora pitch: い(H) の(L) ち(L). With が, いのちが is H L L L. The symbolic notation in NHK 2016 is い\のち, with the "\" between mora 1 and mora 2.7 sci.lang.japan lists "inochi (life) HLL" directly as an example of the falling type.5
The contour on 命 continues across the を particle: い(H) の(L) ち(L) を(L), H L L L. Every mora after mora 1 is L, including the particle, by tonal spreading.1
The が is unambiguously L. This is the が-test confirming accent 1: the L tail that began on mora 2 of 命 continues across the word boundary.15
にほん (nihon, 2): treated as an honest exception
日本 (にほん) is not atamadaka in Tokyo standard. NHK 2016 and OJAD record it as accent 2, and Wiktionary tags it "([Tokyo]) にほん [nìhóꜜǹ] (Nakadaka – [2])". The drop sits between ほ and ん, after mora 2.789 Wikipedia confirms the contour by example: "にほꜜん + の → にほんの (日本の)."3 A heiban-accented variant is also attested in some descriptive sources: sci.lang.japan's homophone table groups "nihon (日本 - Japan)" under the flat (heibanshiki) heading.5 The standard reference accent is nakadaka [2]; heiban is a recognised secondary variant.
This section is a workflow honesty test, not an atamadaka example. It shows how to "guess, then verify in OJAD" with a high-frequency word that learners often think they already know.
Per-mora pitch on 日本: に(L) ほ(H) ん(L). With に, 日本に is L H L L. The drop sits between ほ and ん. This is the nakadaka contour, not atamadaka. An atamadaka 日本 would read に(H) ほ(L) ん(L), and the reference dictionaries do not record it that way.
For an actual atamadaka homophone of にほん, look across the kanji boundary at 二本 (にほん, accent 1, "two long thin things"). sci.lang.japan's homophone table contrasts atamadaka 二本 with non-atamadaka 日本. That makes 二本 the true atamadaka member of the にほん pair.5
鉛筆を二本ください。5
"Two pencils, please."
Per-mora pitch on 二本: に(H) ほ(L) ん(L). This is the canonical HLL contour of a three-mora atamadaka word, identical in shape to 命 above. The kanji are different, the pitch is different, and OJAD will confirm both.85
あめ (ame, 1): "rain"
雨 (あめ) is a two-mora native noun meaning "rain," tagged accent 1 in Tokyo standard.73 Per-mora pitch: あ(H) め(L). With が, あめが is H L L. The NHK 2016 symbolic notation is あ\め.7 Wikipedia and sci.lang.japan both treat 雨 as the canonical atamadaka member of the あめ minimal pair.35
The near-minimal contrast is 飴 ("candy"), which Wiktionary tags "([Tokyo]) あめ [àmé] (Heiban – [0])". Its per-mora pitch is あ(L) め(H); with particle が, あめが is L H H.10 The heiban/atamadaka swap on this two-mora pair is the most-cited demonstration in the literature that mora-1 pitch carries lexical information.103
Per-mora pitch on 雨: あ(H) め(L). With が, あめが is H L L. The が is L, joining the L tail; the が-test confirms atamadaka.15
The genitive の is unaccented and joins the L tail of 雨: 雨の H L L. The atamadaka contour continues across the particle because の has no accent of its own to interrupt it.110
For the same kana with the opposite contour, the planned pitch-accent minimal-pairs article will drill 雨 against 飴 across many sentence frames. The contrast here is a pointer, not the full drill.
Reading the three together
A single recipe holds for every atamadaka word: mora 1 H, every later mora L, particle L. Mora count does not matter. The recipe is the inverse of the heiban recipe at the same length.182
| Word | Morae | Per-mora pitch | With particle (が) |
|---|---|---|---|
| 命 (inochi, 1) | 3 | い(H) の(L) ち(L) | いのちが H L L L |
| 雨 (ame, 1) | 2 | あ(H) め(L) | あめが H L L |
| 飴 (ame, 0) | 2 | あ(L) め(H) | あめが L H H |
| 二本 (nihon, 1) | 3 | に(H) ほ(L) ん(L) | にほんが H L L L |
| 日本 (nihon, 2) | 3 | に(L) ほ(H) ん(L) | にほんが L H L L |
The 飴 row points to the near-minimal contrast for 雨. The 日本 row is the honesty check: its contour is LHL, so it is not atamadaka, no matter how often beginner sources claim otherwise.9105
Good to know
Atamadaka is the only pattern that blocks the initial rise
The Tokyo initial-rise rule places L on mora 1 of every word "unless the first syllable is accented."1 Atamadaka is precisely the case where mora 1 is accented, so the rule cannot apply. Wikipedia states the same exclusion from the other direction: the initial-lowering rule applies in "non-atamadaka" words.3 The result is that atamadaka is the only pattern whose mora 1 is H rather than L. That is why it declares itself faster than any other pattern.
One-mora atamadaka words are dictionary conventions, not in-isolation contrasts
The [1] tag on a one-mora noun like 木 (ki, "tree") is a notation choice, not an audible distinction. Kawahara, p. 451, is direct: monomoraic accented and unaccented words "are phonetically very similar, if not identical, when they appear in isolation."16 The contrast surfaces only on a following particle (L for atamadaka, H for heiban). Learners should not try to hear the [1] in citation form. Use the particle test instead.
木が大きいです。7
"The tree is big."
Per-mora pitch: き(H) が(L). The が is L, which confirms atamadaka on 木.78
English-speaker pitfall: do not lengthen mora 1
A learner whose first language uses English-style stress may instinctively lengthen and intensify the H mora. In atamadaka, mora 1 is H, but it is not long and not loud; the only acoustic difference between mora 1 and mora 2 is F0 height.1 Learners who associate Japanese pitch accent with English stress may produce an audibly foreign 命 even when the pitch contour is right. The stress vs. pitch article handles the wider contrast.
にほん is the workflow's honesty test, not an atamadaka example
Many learner sources mislabel にほん as atamadaka. The standard references do not: NHK 2016, OJAD, and Wiktionary record 日本 (にほん) as accent 2 (nakadaka, with the drop between ほ and ん), with a heiban variant attested in descriptive sources.78935 When a high-frequency word's accent is "common knowledge" online, verify the guess against OJAD. にほん is the canonical case where common knowledge is wrong. The true atamadaka homophone is 二本 ("two long thin things"), which sits at accent 1.5
あめ (rain) is the canonical minimal pair, but it is regionally fragile
In Tokyo standard, 雨 is atamadaka [1] and 飴 is heiban [0].1035 In Keihan (Kyoto–Osaka) accent systems, the polarity is reversed: 雨 is heiban-like and 飴 is head-high-like. Kawahara, p. 446, sets non-Tokyo dialects aside for the chapter's scope, but notes that "there is a wealth of literature on the accent patterns of non-Tokyo dialects."1 The regional pitch-accent variation article treats the Keihan inversion in detail. This article treats the Tokyo polarity as default.
Atamadaka is statistically a minority pattern overall, but structurally dominant where it matters
In Kubozono's corpus, heiban dominates the native-noun inventory at around 71 percent (N = 2,220). The remaining 29 percent of accented native nouns subdivide across atamadaka, nakadaka, and odaka.14 On the whole-vocabulary scale, atamadaka is a meaningful but smaller slice.
The over-representation claim this article makes is conditional on word length, not unconditional. Among one-mora accented native nouns, atamadaka is structurally the only option, because there is no other mora to drop after.13 Among two-mora accented native nouns, atamadaka and odaka are the only options, because nakadaka cannot fit inside two morae.13 In other words, the claim is conditional: short native nouns skew atamadaka. It should never be paraphrased as an unconditional claim.
See also
- Should You Learn Pitch Accent? An Honest Cost-Benefit Analysis
- Pitch Accent for Japanese Verbs and Adjectives: The Binary Class Rule and Conjugation Shifts
- Japanese Compound-Word Pitch Accent: How Two Words Combine into One Accent Pattern