The Complete Katakana Chart (Gojūon): How to Read All 46 Base Kana, Dakuten, and Yōon
The katakana chart is the 5×10 gojūon grid. It indexes every base katakana sound by consonant row and vowel column, plus the syllabic ン that sits outside the grid.1 Katakana shares its sound structure with hiragana, but it uses angular, separately derived glyphs. It also has an extra layer for transcribing foreign sounds.21
Overview
What the chart is in one paragraph
The gojūon (五十音, "fifty sounds") is the standard phonetic order of Japanese kana. It is presented as a 5×10 grid that pairs five vowel columns (a, i, u, e, o) with ten consonant rows (∅, k, s, t, n, h, m, y, r, w).21 Each cell is read as consonant + vowel and corresponds to one mora, the unit of timing in Japanese.3 The same row-and-column structure applies to both syllabaries because the underlying sound system is shared. Only the glyph set differs.21
Katakana itself was developed in the 9th century by Buddhist monks in Nara. They took single components of man'yōgana characters as shorthand for transliterating texts and works from India. The script is called kata (片, "partial, fragmented") for that reason.1
The three tables every chart includes
A complete katakana reference is built from three stacked inventories:
- The base gojūon: 46 distinct kana in modern Japanese, built from 50 grid cells minus 5 phonetic gaps plus the extra-grid ン.2
- Dakuten and handakuten extensions: 20 voiced kana (k→g, s→z, t→d, h→b) plus 5 handakuten kana (h→p), totalling 25 additional kana.4
- Yōon (拗音, "contracted sounds"): 33 palatalized morae formed by combining an i-column kana with a small ャ, ュ, or ョ.5
Together, these three layers give the 46 + 25 + 33 = 104 figure that anchors the modern functional inventory. Katakana also has a fourth layer that hiragana does not: extended combinations for transcribing foreign sounds. These were standardized by Cabinet Notification No. 2, 「外来語の表記」 ("Loanword notation"), issued on 平成3年6月28日 (28 June 1991).67 The extended layer is previewed below and treated in full in a dedicated article on extended katakana for loanwords.
Audience and prerequisites
This page is a reference for an absolute beginner at pre-N5 level. The official JLPT competence summary states that N5 readers should already "read and understand typical expressions and sentences written in hiragana, katakana, and basic kanji." That means the katakana inventory is something a learner should know before starting N5 study.8 A typical reader has already met hiragana and is arriving at katakana as the second of Japan's three scripts.
The companion hiragana chart and the script-order primer are useful side reading; both sit in the writing-systems subcategory of this pillar.
How to read the gojūon chart
Vowel columns: a, i, u, e, o
Five vowel columns form the horizontal spine of the chart.21 Every kana in a column ends in the same vowel sound, and the column header (ア・イ・ウ・エ・オ) doubles as the pure-vowel row when the consonant slot is empty.2 The vowel inventory is identical to hiragana because the two syllabaries share one phonology.21
Consonant rows: ∅, k, s, t, n, h, m, y, r, w
Ten consonant rows form the vertical axis. Row 1 is the pure-vowel row (no consonant); the remaining nine begin with k, s, t, n, h, m, y, r, w.21
The ordering is based on where sounds are made in the mouth. It runs from velar consonants at the back of the mouth toward labial consonants at the front.2 The Gojūon entry notes that the Buddhist monks who designed the system "chose to use the word order of Sanskrit" for important Buddhist writings. In doing so, they inherited the velar-to-labial sequence from the Siddhaṃ script used in Buddhist scholarship.2
The sequence ∅, k, s, t, n, h, m, y, r, w follows articulator position from the back to the front of the mouth.2 Saying the row headers aloud and feeling where each consonant is produced gives the order a physical anchor that pure rote does not.
Reading any cell: consonant + vowel = mora
The intersection of a consonant row and a vowel column gives one mora, the smallest unit of timing in Japanese.3 Two worked examples:
- ナ sits at the n-row crossed with the a-column, so it reads /na/.1
- シ sits at the s-row crossed with the i-column. Its reading is /ɕi/, romanized as shi; the row-expected si does not occur in modern Japanese.1
Four cells break the romaji pattern their row would predict: シ (shi, not si), チ (chi, not ti), ツ (tsu, not tu), and フ (fu, not hu).1 These are exactly the same four cells flagged on the hiragana side, because the underlying sound system is shared between the syllabaries. The phonetic reasoning behind each (palatalization of /s/ before /i/, the affricates in チ and ツ, the bilabial fricative in フ) belongs to a dedicated article in the pronunciation pillar. For now, treat the four cells as fixed exceptions and read them as written.
The special character: ン (syllabic n)
ン is the only kana that lies outside the 5×10 grid.9 The Gojūon entry confirms its status: ん/ン "was not present in Old Japanese" and "is not part of the grid", attached separately at the end.2 It represents a moraic nasal and is the only kana that does not end in a vowel. Wikipedia's Katakana article describes the sound as "a nasal sonorant which, depending on context, sounds like English m, n or ng."1
Even though ン lies outside the grid, it is counted in the modern base inventory and brings the total to 46, in parallel with ん on the hiragana side.29 ン was officially recognized as a single standard kana in the 1900 Japanese script reforms, the same reform that retired hentaigana variants in hiragana.9
The base gojūon table: 46 characters
The full 5×10 grid
| Row | a | i | u | e | o |
|---|---|---|---|---|---|
| ∅ | ア (a) | イ (i) | ウ (u) | エ (e) | オ (o) |
| k | カ (ka) | キ (ki) | ク (ku) | ケ (ke) | コ (ko) |
| s | サ (sa) | シ (shi) | ス (su) | セ (se) | ソ (so) |
| t | タ (ta) | チ (chi) | ツ (tsu) | テ (te) | ト (to) |
| n | ナ (na) | ニ (ni) | ヌ (nu) | ネ (ne) | ノ (no) |
| h | ハ (ha) | ヒ (hi) | フ (fu) | ヘ (he) | ホ (ho) |
| m | マ (ma) | ミ (mi) | ム (mu) | メ (me) | モ (mo) |
| y | ヤ (ya) | (yi) | ユ (yu) | (ye) | ヨ (yo) |
| r | ラ (ra) | リ (ri) | ル (ru) | レ (re) | ロ (ro) |
| w | ワ (wa) | (wi) | (wu) | (we) | ヲ (wo / o) |
Plus the extra-grid kana ン (n).219
The grid is 5 columns by 10 rows, exactly as the Gojūon and Katakana articles describe it.21 The romaji here uses Modified Hepburn. That is why the irregular cells read shi, chi, tsu, fu, and wo / o.
ヲ is conventionally romanized wo when cited as a kana and o when used as the object-marking particle. In running modern Japanese, the object particle is overwhelmingly written with hiragana を. Katakana ヲ appears in older texts and in stylized media, with the Rebuild of Evangelion subtitle ヱヴァンゲリヲン as a canonical example.10
The five gaps and one extra: 50 − 5 + 1 = 46
Of the 50 cells the gojūon grid would theoretically hold, five are empty in modern Japanese:
- yi and wu: never occurred as distinct sounds in Old Japanese.2
- ye: existed in Old Japanese and had its own kana, but "disappeared in Early Middle Japanese, having merged with e."2
- wi (ヰ): existed and was actively written until 1946; the sound merged phonetically with イ by the Kamakura period (13th century).11
- we (ヱ): existed and was actively written until 1946; the sound merged with エ between the Kamakura and Taishō periods.10
ヰ and ヱ were officially retired in 1946 by Cabinet Notification No. 33, 「現代かなづかい」 ("modern kana usage"). This is the same notification that retired ゐ and ゑ in hiragana.121314 The Japanese script reform entry states the rule directly: "two kana, ゐ/ヰ wi and ゑ/ヱ we, were officially declared obsolete, as the pronunciations they represented had dropped from the language many centuries before."12 The standing reference for modern kana usage is the 1986 revision, Cabinet Notification No. 1, 「現代仮名遣い」, which retains the retirement.15
Add the extra-grid ン and the modern base count works out to 50 − 5 + 1 = 46.29
Irregular romanizations to flag (shi, chi, tsu, fu)
Four cells diverge from the romaji their row would otherwise predict:
- シ reads shi, not si.
- チ reads chi, not ti.
- ツ reads tsu, not tu.
- フ reads fu, not hu.
Modified Hepburn romanization matches the actual modern pronunciation in each case.1 These are the katakana glyphs for the same four phonetically shifted morae that produce し, ち, つ, ふ on the hiragana side. The underlying phonology is shared between the syllabaries: palatalization of /s/ before /i/, the affricates [t͡ɕ] in チ and [t͡s] in ツ, and the bilabial fricative [ɸ] in フ. A dedicated article in the pronunciation pillar treats these details in full.
Dakuten and handakuten: 25 voiced kana
The voicing transformation
Dakuten (゛) is a pair of short strokes added to the upper right of a kana. It marks a systematic voicing of the row's consonant: カ→ガ (k→g), サ→ザ (s→z), タ→ダ (t→d), ハ→バ (h→b).4
Handakuten (゜) is a small circle in the same position. It is used only on the h-row to mark /p/: ハ→パ. Wikipedia's Dakuten and handakuten entry describes it as "a diacritic used with kana for morae pronounced with /h/ or /f/ to indicate that they should instead be pronounced with /p/."4
The arithmetic is straightforward: 4 dakuten rows × 5 vowels = 20 kana, plus 1 handakuten row × 5 vowels = 5 kana, for a total of 25.4 The diacritics and the row-by-row transformations are identical to the ones applied on the hiragana side.4
Why handakuten exists only on the h-row
The h-row descends historically from a /p/ series in Old Japanese that weakened through [ɸ] to modern [h]. The handakuten was introduced, including by Portuguese Jesuit transcribers in the Rakuyōshū, to recover the /p/ distinction in writing.4 The diacritic appears on no other row because no other row has that historical alternation.
A full treatment of how dakuten and handakuten work, with the historical detail, belongs to the dedicated article on the voicing marks; the hiragana-side article in this pillar covers the same mechanics and is a useful side reference.
The dakuten/handakuten table
| Row | a | i | u | e | o |
|---|---|---|---|---|---|
| g (k+゛) | ガ (ga) | ギ (gi) | グ (gu) | ゲ (ge) | ゴ (go) |
| z (s+゛) | ザ (za) | ジ (ji) | ズ (zu) | ゼ (ze) | ゾ (zo) |
| d (t+゛) | ダ (da) | ヂ (ji) | ヅ (zu) | デ (de) | ド (do) |
| b (h+゛) | バ (ba) | ビ (bi) | ブ (bu) | ベ (be) | ボ (bo) |
| p (h+゜) | パ (pa) | ピ (pi) | プ (pu) | ペ (pe) | ポ (po) |
Total: 20 dakuten + 5 handakuten = 25 derived kana.4
ヂ and ヅ are pronounced identically to ジ and ズ in modern standard Japanese. However, the 1986 「現代仮名遣い」 ("modern kana usage") restricts their use to specific etymological contexts: rendaku of チ/ツ and repeated-mora compounds.151 The same rule governs the hiragana pair ぢ/づ. Default to ジ and ズ; ヂ and ヅ are not free variants.
Yōon: 33 contracted sounds
How yōon combine
A yōon (拗音) is a mora "formed with an added [j] sound, i.e., palatalized."5 In writing, a yōon is built from an i-column kana plus a small ャ, ュ, or ョ; the two written characters collapse into one mora.53
Only i-column kana host yōon. The seven base hosts are キ, シ, チ, ニ, ヒ, ミ, リ. The five voiced and handakuten variants are ギ, ジ, ヂ, ビ, ピ.5 Mora-wise, the small ャ/ュ/ョ "do not represent a mora by themselves and attach to other kana", so the resulting two-kana cluster reads as a single mora.3 The mechanic is identical to hiragana yōon: one phonological rule applied across both syllabaries.
The yōon table
| Host | + ャ | + ュ | + ョ |
|---|---|---|---|
| キ | キャ (kya) | キュ (kyu) | キョ (kyo) |
| シ | シャ (sha) | シュ (shu) | ショ (sho) |
| チ | チャ (cha) | チュ (chu) | チョ (cho) |
| ニ | ニャ (nya) | ニュ (nyu) | ニョ (nyo) |
| ヒ | ヒャ (hya) | ヒュ (hyu) | ヒョ (hyo) |
| ミ | ミャ (mya) | ミュ (myu) | ミョ (myo) |
| リ | リャ (rya) | リュ (ryu) | リョ (ryo) |
| ギ | ギャ (gya) | ギュ (gyu) | ギョ (gyo) |
| ジ | ジャ (ja) | ジュ (ju) | ジョ (jo) |
| ビ | ビャ (bya) | ビュ (byu) | ビョ (byo) |
| ピ | ピャ (pya) | ピュ (pyu) | ピョ (pyo) |
Count: 11 hosts × 3 small kana = 33 yōon combinations.5 A ヂャ/ヂュ/ヂョ row appears in some historical charts but is pronunciation-identical to ジャ/ジュ/ジョ. The 1986 「現代仮名遣い」 restricts ヂ to narrow etymological contexts, so canonical pedagogical charts list 33 rather than 36.15
Why ツ + ヤ ≠ ツャ
The size of the second kana is the cue. ツヤ is two full-sized characters and reads as two full morae (tsu + ya). A hypothetical ツャ would be one mora, but the small ャ never attaches to ツ in modern Japanese. ツ is in the u-column, not the i-column, and yōon hosts are i-column kana only.5
The "small kana plus its host equals one mora" rule is the same mechanism that makes シュ one mora in シュ, キョ one mora in キョ, and so on.3 The behaviour is identical to the hiragana case (つや vs しゅ vs きょ) because yōon is a phonological category, not a script feature.
Extended sounds for loanwords: a brief preview
Why katakana needs sounds hiragana does not
Katakana carries the burden of transcribing words from foreign languages. The Katakana entry lists the script's modern uses as "transcription of words from foreign languages or loanwords," country names, onomatopoeia, "technical and scientific terms," and "words the writer wishes to emphasize."1
Foreign sound inventories include phonemes the Japanese gojūon never contained: /v/, /f/ before non-/u/ vowels, /ti/, /tu/ distinct from /tsu/, /di/, /du/, /wi/, /we/, /wo/, /ʃe/, /tʃe/, /dʒe/, and others. To write them, katakana has added a fourth inventory layer: a base kana plus a small vowel character (ァ, ィ, ゥ, ェ, ォ). Wikipedia's Katakana article illustrates the mechanic with patterns such as ファ (fa), ウィ (wi, as in ウィキペディア "Wikipedia"), and ディ (di).1
The idea is the same as yōon (a base kana plus a smaller second character), but the second character is a small vowel rather than a small ャ/ュ/ョ.167
The 1991 Cabinet guidance
The standing reference for these extended forms is Cabinet Notification No. 2, 「外来語の表記」 ("Loanword notation"), promulgated on 平成3年6月28日 (28 June 1991) by the Japanese Cabinet on the recommendation of the 国語審議会 (Japanese Language Council).67 The notification provides 「『外来語の表記』のよりどころ」, a reference standard for transcribing loanwords in contemporary Japanese for general social use.7
The notification is organized as two tables. Table 1 (第1表) lists kana characters commonly used for transcribing loanwords and foreign personal and place names. Table 2 (第2表) lists additional kana characters used when transcription should stay closer to the original sound or original spelling.7 The two-table structure creates spelling splits like バイオリン (Table 1, conventional) versus ヴァイオリン (Table 2, closer to source) for "violin". Wikipedia's Katakana entry describes the same two-table system without naming the notification, noting that "Digraphs with orange backgrounds are the general ones used for loanwords or foreign places or names, and those with blue backgrounds are used for more accurate transliterations of foreign sounds."1
What this section deliberately does not cover
The full roster of roughly forty extended combinations belongs to a dedicated article on extended katakana for loanwords. So do the ヴ-row mechanics, the conventional-versus-closer-to-source split (the ヴァイオリン / バイオリン kind of case), and the rules for transliterating specific foreign names. This page names the layer and points at the 1991 notification, no further.
The full inventory: 46 + 25 + 33 = 104 (plus the extended layer)
What "complete" means here
The 104 figure is the modern functional inventory of the gojūon-anchored layer: 46 base gojūon, 25 dakuten and handakuten extensions, and 33 yōon.245 That number is what a learner needs to read the native portion of modern Japanese without consulting a romaji crutch.
The extended-katakana loanword layer sits on top of that. It is governed by Cabinet Notification No. 2, 「外来語の表記」 ("Loanword notation"), and standardized as roughly 36 additional combinations across Tables 1 and 2 of the notification.67 Treat the extended layer as a separate inventory for transcribing foreign sounds, not as an addition to the 104 figure.
Two other devices appear in any complete katakana text without adding to the inventory count. The sokuon ッ (the small ツ marking gemination) is a positional use of an existing kana; it counts as an independent mora when read but is not a new character.3
Long vowels in katakana use a distinct marker: the chōonpu (long-vowel mark), "a short line (ー) following the direction of the text".1 The rule for when to write ー belongs to a dedicated article on long vowels in katakana.
What this article does not cover
Several topics have their own dedicated articles in this subcategory: stroke order, mnemonic-led memorization order, the lookalike pairs (シ/ツ, ソ/ン, ク/ワ, ヲ/フ), the chōonpu rule for long vowels, foreign-name transliteration, the stylistic use of katakana for native words, the deeper treatment of the extended-sound layer, and katakana's standalone history. The chart's job here is to fix the inventory. How to write, memorize, and disambiguate the glyphs lives elsewhere.
五十音 vs. 46: the historical inventory
The original count: ヰ, ヱ, and the three phantom cells
The "fifty" in 五十音 comes from the 5 × 10 = 50 cell layout, but the chart has never contained fifty distinct sounds. The Gojūon entry confirms the chart never included yi or wu, and the kana for ye "disappeared in Early Middle Japanese."2 Three cells (yi, ye, wu) were phantom from the start.
ヰ (wi) and ヱ (we) were still in active use until the modern reforms. Their pronunciations had merged with イ and エ much earlier: ヰ/イ merged by the 13th century, in the Kamakura period;11 ヱ/エ merged between the Kamakura and Taishō periods.10 The pre-reform written inventory of base katakana was therefore 48 (46 + ヰ + ヱ), identical to the hiragana case.21110
NINJAL frames the count discrepancy bluntly: 「アイウエオの総数は『五十』ではありません」, that is, the total of aiueo is not "fifty." Charts contain blank cells and duplicated characters.16 NINJAL also notes that the final ん/ン was added to the chart from the Meiji period onward for educational use.16
The 1946 reform: gendai kanazukai
「現代かなづかい」 ("modern kana usage") was promulgated on 16 November 1946 as 内閣告示第33号 (Cabinet Notification No. 33 of Shōwa 21).1314 The Japanese script reform entry states the date directly: "On 16 November 1946, historical kana usage underwent official reform to reflect modern pronunciation as gendai kanazukai."12 On the same day, the 当用漢字 (Tōyō kanji) list was promulgated as a companion notification. Together, the two notifications established the post-war orthographic standard.13
The reform replaced historical kana orthography (歴史的仮名遣い / kyū kanazukai) with a phonetic-spelling principle: kana usage now reflects modern pronunciation.17 It applied to both syllabaries in parallel, retiring ヰ/ゐ and ヱ/ゑ together. The We (kana) entry states the same rule for katakana: "Along with the kana for wi ('ゐ' in hiragana, 'ヰ' in katakana), this kana was deemed obsolete in Japanese in 1946 and replaced with え and エ."10
The three particle-spelling exceptions on the hiragana side (は・へ・を when used as particles) have no functional katakana parallel in modern usage. Pre-war katakana texts did use ヲ as the object particle, but this is a residue of the pre-reform script rather than a retained exception.1 The 1946 notification was superseded in revised form by 「現代仮名遣い」 (内閣告示第1号), promulgated 1 July 1986. The 1986 revision is the current legal reference and retains the ヰ/ヱ retirement.15
Where ヰ and ヱ still appear today
ヰ and ヱ persist as a deliberate stylistic choice in brand names, literary reprints, and stylized media titles. The reader is expected to recognize them on sight but not to write them. Four documented examples:
ニッカウヰスキー11
"Nikka Whisky."
The brand name uses ヰ as a stylistic retention; the pronunciation is Nikka Uisukī, identical to what a modern ウィスキー would yield.11
ヱビスビール10
"Yebisu beer."
The We (kana) entry names this case explicitly: "the beer Yebisu (ヱビス), which is actually pronounced 'Ebisu'."10
ヱヴァンゲリヲン新劇場版10
"Rebuild of Evangelion."
The Japanese title stylistically substitutes ヱ and ヲ for エ and オ; the pronunciation is unchanged.10
空想メソロギヰ11
"Kūsō Mesorogī" (opening theme of the anime Mirai Nikki).
The ヰ stands in stylistically for イ in a coined word built on the English "mythology"; the pronunciation is Mesorogī.11
Modern loanword transcription uses ウィ and ウェ instead of the retired ヰ and ヱ to write English /wi/ and /we/. That follows Table 2 of Cabinet Notification No. 2, 「外来語の表記」 ("Loanword notation"), so the historical kana are not part of the modern loanword toolkit.67
Katakana's separate historical role, briefly
Before 1946, katakana (not hiragana) was the default script for legal, governmental, and military writing. Wikipedia's Katakana entry states the case plainly: "Official documents of the Empire of Japan were written exclusively with kyūjitai and katakana."1
Pre-war official documents "mix katakana and kanji in the same way that hiragana and kanji are mixed in modern Japanese texts, that is, katakana were used for okurigana and particles such as wa or o."1 This is the historical context for reading katakana ヲ as the object particle in older legal texts.
Wikipedia's Japanese writing system entry notes that the post-war reforms "established a functional division between the two syllabaries comparable to the distinction between lowercase and uppercase letters." That is the hiragana / katakana split a contemporary learner encounters.18 Pre-war, the split was register-based: formal katakana documents versus informal or literary hiragana documents. Post-war, it is functional: native words and grammar in hiragana, loanwords and emphasis in katakana. The full historical depth belongs to a dedicated article on the history of katakana.
Good to know
"Gojūon" applies to both syllabaries, and the chart name predates the modern split
The term 五十音 is shared between hiragana and katakana; both scripts are ordered by the same gojūon system. The Gojūon entry presents hiragana characters in its primary table with katakana equivalents noted, treating both scripts as one phonetic ordering.2
Dictionary ordering uses 五十音順 (gojūon-jun), Japanese's equivalent of alphabetical order. It applies identically to both syllabaries because the phonetic axes are one system.162 NINJAL confirms that the count discrepancy applies to the shared system: charts contain blank cells and duplicated characters, the total is not fifty, and the final ん/ン was added from the Meiji period onward.16
Why "fifty sounds" when the chart shows 46
The name comes from the 5 × 10 = 50 cell layout, not from a literal count of distinct sounds. Five cells produce no distinct modern sound: yi, ye, and wu were never written in modern Japanese (or had merged before the gojūon ordering was devised), and the retired ヰ (wi) and ヱ (we) merged with イ and エ centuries before their 1946 retirement.1621110 ン is added back from outside the grid, and the modern functional count works out to 50 − 5 + 1 = 46.
Katakana and hiragana share phonology, not glyphs
The row and column structure is identical because the underlying sound system is one. Both scripts follow identical gojūon ordering on a 5×10 grid.2 The visual difference comes from historical origin: katakana glyphs descend from 9th-century Buddhist-monk shorthand on man'yōgana components, while hiragana descends from the cursive sōgana adopted in Heian-era women's literary writing.1 The angular shapes a learner sees in katakana are direct artifacts of that shorthand origin.
The chart is a phonetic index, not a difficulty curve
The ordering is phonological (vowel × consonant axes inherited from Sanskrit Siddhaṃ), not pedagogical.2 Marching down the chart top-left to bottom-right is not a learning order; a mnemonic-led sequence belongs to a dedicated article on katakana mnemonics. The chart's job is to fix the inventory and to give the reader a lookup index.
Romaji on the chart is a pronunciation key, not a script
Romaji exists on the chart only to bootstrap pronunciation while the learner is reading the kana for the first time. The four cells that diverge from row-expected romaji (シ shi, チ chi, ツ tsu, フ fu) reflect actual modern pronunciation, not a spelling-system inconsistency. The underlying phonology is shared with the hiragana cells し, ち, つ, ふ.1 Once the reader can decode the chart unaided, the romaji column has done its job.
The mora, not the syllable, is the unit a chart counts
Each kana cell on the chart is one mora. Each yōon cluster of two written kana is also one mora.3 The small ャ/ュ/ョ "do not represent a mora by themselves and attach to other kana", which is why キョ in トーキョー counts as one mora rather than two.3 The syllabic ン and the sokuon ッ each count as one mora despite being voiceless or vowel-less. The chōonpu ー also counts as one mora when read in katakana long-vowel notation, though it is a marker rather than a new kana.13
Treating キャ as two morae because it is two written characters
A common beginner mistake is to count トウキョウ as five morae (to-u-ki-yo-u) because the word is written with five kana. The correct count is four (to-u-kyo-u): キョ is a single yōon and reads as one mora.53 The small ャ/ュ/ョ does not represent an independent mora. It palatalizes the preceding i-column kana, and the resulting two-character cluster shares one mora.3
Confusing ヰ/ヱ with ウィ/ウェ
A learner who has just met the retired ヰ and ヱ may reach for them when writing modern loanwords containing /wi/ or /we/, producing forms like ヰファイ for "wi-fi". The correct modern transcription is ウィーファイ (or ワイファイ): ウィ and ウェ are the standardized loanword forms under Cabinet Notification No. 2, 「外来語の表記」 ("Loanword notation").67 ヰ and ヱ are reserved for stylistic, historical, and proper-noun contexts only.1110 Mixing the two registers looks anachronistic and signals to the reader that the writer is treating the retired kana as still active.
ヰ and ヱ in modern brand names and proper nouns
The retired kana are not extinct in writing; they survive as a stylistic choice in brand names (ニッカウヰスキー, ヱビス), in literary reprints, and in stylized media titles (ヱヴァンゲリヲン新劇場版, 空想メソロギヰ).1110 A reader is expected to recognize the characters on sight in those contexts but not to use them productively. The pronunciation is always the merged modern vowel. ヰ reads as イ, and ヱ reads as エ.
Katakana lookalikes are a separate problem from chart literacy
Mastering the chart does not protect against confusing シ/ツ, ソ/ン, ク/ワ, or ヲ/フ in running text. Those pairs are a handwriting and stroke-direction problem layered on top of chart literacy. The chart's job is the inventory, not disambiguation. A dedicated article on katakana lookalikes carries the side-by-side comparisons and the stroke-direction rule.
See also
- Hiragana vs. Katakana: How to Tell Them Apart and Use Both
- Katakana Mnemonics That Actually Work
- Mixed Script: How Japanese Combines Kanji, Hiragana, and Katakana
- The Japanese Vowel Inventory: Five Vowels, Done Right
- Long vs. Short Vowels in Japanese: The Distinction Beginners Miss
- Why "Tokyo" Is Two Syllables in English and Four Morae in Japanese: Loanwords as a Timing Drill