Japanese Long Vowels, Small Tsu and Contracted Sounds

A long vowel adds a beat of vowel sound, small っ adds a beat to the following consonant, and a contracted combination such as きゃ fits into one beat. They change different parts of pronunciation, so practise them as separate patterns before mixing them in words.

Count timing units rather than printed symbols

The useful beginner unit is the mora, often called a beat. An ordinary kana usually represents one mora. The extra length of a long vowel counts as another, and small っ and nasal ん each count as one. A combination such as きゃ contains two written characters but represents one mora.

Pattern	Word	Beat breakdown	Main action
Short vowel	おばさん	お・ば・さ・ん	Ordinary vowel length
Long vowel	おばあさん	お・ば・あ・さ・ん	Sustain the a
Small tsu	きって	き・っ・て	Hold the t closure
Contracted sound	きゃく	きゃ・く	Produce kya together

Tap gently while practising slowly. Tapping helps you notice a missing timing unit; it is not a claim that natural speech has mechanically identical beats with no expressive variation.

Long vowels: preserve the vowel

おばさん means aunt or a middle-aged woman, while おばあさん can mean grandmother or an elderly woman. The difference is the extra a after ba. Slowing down the whole word does not create the same contrast. Sustain the relevant vowel while keeping the rest of the word moving.

Katakana makes length visible with ー. Compare ビル, building, and ビール, beer. The mark extends the vowel before it, so it does not have a fixed sound of its own. In コート it extends o; in コーヒー the two marks extend different vowels.

Hiragana usually spells length with vowel characters. An e followed by い or an o followed by う often produces a long vowel in ordinary words. Learn the actual word spelling and audio together: せんせい and おおきい do not offer a universal rule for rewriting every sequence. Adjacent vowels can also cross word or grammatical boundaries, where a simple merging rule is unreliable.

Small っ: prepare the next consonant

In きって, small っ is not pronounced tsu. After ki, place your tongue for t, keep the closure for a beat, then release into te. Compare きて with きって and listen specifically for that extra consonant duration.

The mouth position depends on the following consonant. In さっか, the hold belongs to k. In カップ it belongs to p, so the lips close. With a fricative, as in ざっし, the consonant can continue as friction rather than a completely silent pause. “Stop briefly” is therefore a starting reminder, not a complete description of every example.

Avoid inserting an extra vowel. Saying ki-tsu-te produces a different sequence, and shouting te does not replace the missing timing unit. Practise the mouth action quietly, then add the preceding sound once the hold feels manageable.

Contracted sounds: combine instead of separating

きゃ is kya, not a full ki followed by a separate ya. Its small ゃ combines with the preceding character. The same applies to きゅ, きょ, しゃ and ちょ, with matching katakana forms such as キャ and シュ.

Compare びよういん, beauty salon, with びょういん, hospital. The first begins bi-yo-o; the second begins byo-o. A contracted sound and a long vowel can occur together, so you need to identify both rather than choosing only one label for the whole word.

Full-size や and small ゃ are meaningfully different. Read the size carefully even when a font makes it subtle. Borrowed-sound combinations such as ティ and ファ also need combined reading, but they are a separate extension of the basic pattern rather than ordinary ki-plus-small-ya examples.

Try a mixed diagnosis

Word	Notice first	Reading task
コート	ー	Sustain o
カップ	Small ッ	Hold the p closure
しゃしん	Small ゃ and ん	Keep sha combined; give ん a beat
きょう	Small ょ and う	Read kyo, then vowel length

First identify the spelling feature without speaking. Then listen and repeat. Finally hide the word and choose between two written alternatives after hearing audio. This separates visual recognition, production and listening, making it easier to discover which skill needs work.

Where to learn

Jigu Japanese includes long-vowel, small-tsu and contracted-sound listening contrasts in its 62 free kana lessons. It is available on iOS and HarmonyOS, with English explanations on iOS and Simplified Chinese explanations on HarmonyOS.