Small Tsu and Long Vowels in Japanese: How to Read っ, ッ and ー
Count beats, not letters. Small っ/ッ is one silent beat that doubles the next consonant; long vowels add one beat, written with an extra kana in hiragana and ー in katakana.
Inku editorial team · · 4 min read
A small っ (katakana ッ) is not read as “tsu.” It adds one silent beat that holds the next consonant: きて (kite) becomes きって (kitte). A long vowel holds the vowel for one extra beat: おばさん (obasan, “aunt”) becomes おばあさん (obaasan, “grandmother”). In katakana, the bar ー does the same job. If you count beats instead of letters, both marks become easy to read.
Japanese is counted in beats
Japanese rhythm is built on a unit called a mora, or 拍 (haku) in Japanese. The Tokyo University of Foreign Studies pronunciation module on moras explains that native speakers hear each mora as having the same length, and that one kana usually equals one mora.
The same module names the sounds learners often find hard: small っ, ん, and the second half of a long vowel. Each of these takes a full beat. A short Japan Foundation teaching note on haku uses the same idea: きって has three beats (き・っ・て), and おじさん has four while おじいさん has five.
How to read a small っ or ッ
Look at the size first. A full-size つ is the syllable “tsu.” A small っ sits low and takes up less space. It has no sound of its own.
The TUFS module on the small tsu describes it as one mora of silence shaped like the next consonant. Before ぱ, た or か, your mouth gets ready for p, t or k and pauses for a beat. Before a sound from the さ row, you stretch the s sound instead. English speakers can feel this in the two k sounds of “bookcase.”
In romaji, the small tsu doubles the next consonant:
- きて (kite), “come (and…)” vs きって (kitte), “postage stamp”
- がっこう (gakkou), “school”
- カップ (kappu), “cup”
Japan's official rules for loanwords, 外来語の表記 (Agency for Cultural Affairs), write this sound with a small ッ in katakana, as in カップ.
How long vowels are spelled in hiragana
Hiragana normally writes a long vowel with an extra vowel kana. The government spelling standard, 現代仮名遣い, sets the pattern:
- あ row adds あ: おかあさん (okaasan), “mother”
- い row adds い: おじいさん (ojiisan), “grandfather”
- う row adds う: くうき (kuuki), “air”
- え row adds え in a few words such as おねえさん (oneesan), “older sister”
- お row adds う: おとうさん (otousan), “father”
Two spellings surprise beginners. Many long e sounds are written with い, as in えいが (eiga, “movie”) and とけい (tokei, “clock”). Some long o sounds are written with お, as in おおきい (ookii, “big”) and とおい (tooi, “far”). The second part of the same standard lists these cases.
The TUFS long vowel module adds the reading rule: おう is usually pronounced as a long o, and えい as a long e, not as two separate vowels. So せんせい (sensei) normally sounds like “se-n-se-e.”
The katakana bar: ー
Katakana uses the long vowel mark ー instead of an extra vowel. The loanword rules give examples such as ゲーム (geemu, “game”) and テーブル (teeburu, “table”).
Read the bar as “hold the vowel before me for one more beat.” ケーキ (keeki, “cake”) has three beats. コーヒー (koohii, “coffee”) has four.
Three misreadings to watch for
- Reading っ as “tsu.” きって is not “ki-tsu-te.” It is “ki,” a held beat, then “te.”
- Dropping the extra beat. ここ (koko) means “here.” こうこう (koukou) means “high school.” The long vowels are the only difference.
- Pronouncing every vowel letter. とけい is usually “to-ke-e,” and おとうさん is “o-to-o-sa-n.” Keep the extra beat, but do not add a new sound.
For more about where っ and ー fit in early kana study, see how to learn hiragana in three days. For the difference between the two scripts, read hiragana vs katakana.
Count the beats on real words
Open the JLPT N5 starter deck in Inku’s free browser flashcards. It includes 学校 (がっこう), 先生 (せんせい) and 大きい (おおきい). Before you flip each card, say the reading and tap one finger per beat. がっこう, せんせい and おおきい each have four. If you tapped three, you dropped the っ or the long vowel, so press Again. If the base つ and ツ shapes still slow you down, take a round of the kana quiz first; it covers base kana only, not small kana or ー.
Sources
- TUFS Language Modules: Moras — Mora as the basic rhythm unit with equal duration; one kana is usually one mora; small っ, ん and the second half of a long vowel are each one mora. (checked 2026-10-15)
- TUFS Language Modules: Mora obstruent — Small っ is one mora with no sound of its own; silent hold before p/t/k; lengthened consonant before the sa row; the bookcase comparison. (checked 2026-10-15)
- TUFS Language Modules: Long vowels — Long vowels last two moras; ー marks them in katakana; おう is pronounced as long o and えい as long e. (checked 2026-10-15)
- The Japan Foundation, Sydney: Teachers' notes on mora (haku) — きって has three haku; おじさん four and おじいさん five; コーヒー four. (checked 2026-10-15)
- Agency for Cultural Affairs: 現代仮名遣い, 本文 第1 — Small っ for the sokuon (example がっこう) and long-vowel spelling by row (おかあさん, おじいさん, くうき, ねえさん, おとうさん). (checked 2026-10-15)
- Agency for Cultural Affairs: 現代仮名遣い, 本文 第2 — Words written with お for long o (おおきい, とおい) and with い after the e row (えいが, とけい). (checked 2026-10-15)
- Agency for Cultural Affairs: 外来語の表記, 留意事項その2 — Small ッ for the sokuon in loanwords (カップ) and the long vowel mark ー (ゲーム, テーブル). (checked 2026-10-15)
- Inku: Free kana quiz — Modes (hiragana, katakana, both, lookalikes), one character at a time, typed romaji answers, ten-question sessions. (checked 2026-10-15)
Prepared by our editorial team with AI assistance. Product details are checked against the sources below.