The small っ is just a doubled consonant

Yesterday you finished the hiragana chart with わ, を, and ん. Today you meet the one kana that is not a sound at all.

The character that is a pause

Look at がっこう（gakkou）— school. That little っ between が and こ is not "tsu." It is a held breath. You close your mouth or hold your tongue for one beat before the next consonant, then release.

In romaji we write that pause by doubling the consonant: gakkou. In kana we write it with っ. Same thing, two alphabets.

So the typing rule is almost embarrassingly simple: type the next consonant twice.

• がっこう → ga + k + k + o + u
• ちょっと → cho + t + t + o
• きっぷ → ki + p + p + u
• いってきます → i + t + t + e + ki + ma + su

You never type a separate key for っ. The doubling is the key.

Why your keyboard does this

Japanese input methods watch for a consonant typed twice in a row. When they see it, they insert っ and keep one consonant for the next syllable. It is a shortcut built for exactly this pattern, because the small っ is common in everyday words.

Try it in your notes app right now. Type kko and watch っこ appear. Then type kko again and delete one k. You get こ. The difference between a pause and no pause is one keystroke.

The three patterns that cover most words

っ + k: がっこう（gakkou, school）, にっき（nikki, diary）, けっこん（kekkon, marriage）

っ + t: ちょっと（chotto, a little）, いってきます（ittekimasu, I'm leaving）, かった（katta, bought）

っ + p: きっぷ（kippu, ticket）, いっぱい（ippai, full）, コップ（koppu, cup）

Notice that all three are voiceless consonants — k, t, p. The small っ does not appear before voiced sounds like b, d, g in native Japanese words. If you find yourself wanting to double a b, stop and check.

What about at the end of a word

Sometimes っ lands at the end, especially in casual speech and in manga. あっ（a!）or しまった（shimatta, oops）. For typing, the same rule applies: a + t + t gives あっ. If nothing follows the っ, the input method still holds it there. You can also type a lone xtu or ltu to get っ by itself, but you will rarely need that.

A sentence you can type tonight

わたしは がっこうに いって、にっきを かきます。 (watashi wa gakkou ni itte, nikki o kakimasu.) I go to school and write a diary.

Type it slowly. Every っ is just a doubled consonant. If you make a mistake, it is almost always because you typed the consonant once instead of twice.

The mistake that feels like a bug

When っ does not appear, it is not your keyboard misbehaving. You typed gakou instead of gakkou. One extra k is the whole difference between がこう and がっこう. Same for ちょと and ちょっと. The pause is information, and the input method needs that second consonant to know you meant it.

In a chat with someone in your city, a missing っ can change a word enough to cause a double-take. It is worth the extra half-second.

Tomorrow we deal with the opposite problem: vowels that are too long, and the two different ways Japanese spells them.