When I first encountered contracted sounds, I was somewhere around week three of studying hiragana. I was moving through a vocabulary list and kept hitting pairs like しゅ and ちょ that I couldn't parse. I knew し and I knew ゅ — but written side by side, small ゅ tucked next to し, they looked like a typo or some edge case I hadn't learned yet. I skipped them and kept going, which was a mistake, because they showed up constantly.
The thing I didn't understand yet was that there's nothing new here to memorize. Not really. Contracted sounds — called 拗音 (yōon) in Japanese — are built entirely from characters you already know. The only new piece is a single rule about what a small や, ゆ, or よ does when it sits next to a consonant. Once that clicked for me, 33 separate combinations collapsed into one pattern.
How it works
Every contracted sound follows the same structure: take an i-row character (き, し, ち, に, ひ, み, り — the ones ending in the "i" vowel), and place a small ゃ, ゅ, or ょ beside it. The small size is the signal. Full-size や would mean two separate sounds. Small ゃ means you blend them into one syllable.
So き (ki) + small ゃ becomes きゃ — not "ki-ya" but a single sound: "kya." The "i" disappears and you're left with the consonant fused to the ya/yu/yo sound.
That's the whole rule. Everything else is just applying it across different rows.
The complete tables
Hiragana contracted sounds:
| | ゃ | ゅ | ょ |
|---|---|---|---|
| き (ki) | きゃ kya | きゅ kyu | きょ kyo |
| し (shi) | しゃ sha | しゅ shu | しょ sho |
| ち (chi) | ちゃ cha | ちゅ chu | ちょ cho |
| に (ni) | にゃ nya | にゅ nyu | にょ nyo |
| ひ (hi) | ひゃ hya | ひゅ hyu | ひょ hyo |
| み (mi) | みゃ mya | みゅ myu | みょ myo |
| り (ri) | りゃ rya | りゅ ryu | りょ ryo |
The same pattern extends to the dakuten and handakuten rows:
| | ゃ | ゅ | ょ |
|---|---|---|---|
| ぎ (gi) | ぎゃ gya | ぎゅ gyu | ぎょ gyo |
| じ (ji) | じゃ ja | じゅ ju | じょ jo |
| び (bi) | びゃ bya | びゅ byu | びょ byo |
| ぴ (pi) | ぴゃ pya | ぴゅ pyu | ぴょ pyo |
Katakana contracted sounds follow exactly the same structure — キャ, シュ, チョ, and so on — just using katakana characters. If you know the hiragana versions, the katakana ones cost almost nothing extra.
Why they show up everywhere
Contracted sounds aren't an advanced edge case. They're in some of the most common words in Japanese:
- しゃしん (shashin) — photograph
- りょこう (ryokō) — travel
- きゃく (kyaku) — guest
- ちゅうがく (chūgaku) — middle school
- びょういん (byōin) — hospital
- じゅう (jū) — ten
- ちょっと (chotto) — a little / just a moment
- しゅくだい (shukudai) — homework
I noticed that once I started recognizing contracted sounds, an entire category of words that had seemed unreadable became accessible. A lot of the vocabulary I'd been sounding out wrong — because I was reading the small character as a separate syllable — suddenly made sense.
The one pronunciation thing worth noting
The contracted sound is always a single syllable. This seems obvious once you know it, but before it clicked, I kept trying to give the small ゃ its own beat. The test is simple: "sha" is one syllable, "shi-ya" is two. If you're saying two syllables, you're reading it wrong.
The consonant and the small character merge. The original "i" vowel disappears completely. き is "ki," but きゃ is "kya" — the "i" is gone.
Noticing the size difference
When you're reading Japanese text, the small ゃ/ゅ/ょ really is visually smaller than a regular character. In handwriting and some fonts the difference is obvious; in others it's subtler. Worth paying attention to, because the distinction matters: にゆ would be two separate sounds (ni-yu), while にゅ is one contracted sound (nyu). The size is the only signal.
Studying them in Hirakata
In Hirakata, contracted sounds are a separate character set you can enable alongside basic hiragana or katakana. If you've already got the basics solid, I'd suggest turning them on in Review mode first — just to see the full set laid out at once and confirm that yes, these are all just characters you already know arranged by the same rule. Then Quiz mode will drill them until they're automatic.
For everything on building up to this point, Getting Started with Hiragana covers the 46 base characters, and the dakuten and handakuten article covers the voiced/semi-voiced variants. Contracted sounds sit at the end of that sequence — one rule applied to characters you've already learned.