How to type Japanese on iPhone with Romaji
Romaji spells Japanese sounds in Latin letters you already know, and the keyboard turns each one into hiragana as you go, with kanji a tap away in the candidate bar. How mora-based typing works, why doubled consonants and a lone n behave differently from ordinary letters, and how to turn it on.
Japanese looks like it should need its own keyboard layout, built around symbols nobody outside Japan grew up pressing. The Romaji method sidesteps that entirely: you type the sound of a word using the same twenty-six letters an English keyboard uses, and the keyboard turns each sound into the matching Japanese character as you go. No new layout to memorise — just a set of habits for how Japanese sounds map onto the letters you already know.
Turning it on
- Settings → General → Keyboard → Keyboards → Add New Keyboard…
- Choose Japanese from the list.
- Pick Romaji from the input methods offered under that language — the other option, Kana, arranges the actual kana characters onto a flick-based layout instead of Latin letters, which is the one to skip if you think in the Latin alphabet rather than in kana shapes.
Typing one mora at a time
Japanese is built from mora rather than letters — a mora is one consonant sound fused to one vowel, or a vowel standing alone, and each one has its own hiragana character. Type “ka” and か appears; “ki” gives き, “ku” gives く, and so on through every consonant row. Type a lone vowel — a, i, u, e or o — and you get あ, い, う, え or お with no consonant needed. A word assembles the same way English assembles from letters, except the unit sliding into place is a whole consonant-vowel pair rather than a single letter.
The doubled consonant that is not a typo
Some Japanese words have a short, silent pause between two syllables, written with a small っ. Typing it is not a separate key — it comes from typing the following consonant twice. “Kitte” (a postage stamp) becomes きって: the doubled t tells the keyboard to insert っ before the て rather than typing an actual double consonant sound. Seeing a repeated letter in the middle of a Romaji word is normal, not a slip of the thumb.
Why a lone n needs its own habit
ん is its own mora — a nasal sound with no vowel attached — but a single “n” is also the start of な, に, ぬ, ね and の. Typing “n” and then a vowel commits to that row, which means a bare ん needs a way to say “stop here, no vowel is coming.” iOS resolves it by treating a doubled “nn”, or an “n” followed by a consonant, as ん on its own. Typing “kon” for こん therefore usually needs “konn” or a following consonant to land correctly rather than the single n a direct transliteration would suggest.
From hiragana to kanji, one tap away
As you type, the hiragana appears underlined rather than settled into the text — a sign the keyboard is still waiting to see whether you want it converted. A candidate bar above the keyboard offers kanji and katakana matches for what you have typed so far, the same bar Chinese Pinyin input uses for its character candidates. Tap a candidate to swap the hiragana for it, or keep typing and tap space or return to leave the hiragana exactly as typed — plenty of Japanese words, especially short grammatical ones, are written in hiragana on purpose rather than converted at all.
Where Kibo fits
Japanese is one of the 30 typing languages built into Kibo, alongside Korean and Chinese as the three that compose rather than simply mapping a key to a letter. It turns romaji into kana the same way described above, and switching to it is a tap or a hold on the globe key like any other language in Kibo’s list — no separate keyboard to add in Settings, no Full Access needed for typing in any language. Kibo is free to download.
Frequently asked questions
Do I need a separate app to type Japanese on iPhone?
No. Japanese is one of the languages iOS ships with. Add it in Settings → General → Keyboard → Keyboards → Add New Keyboard…, choose Romaji as the input method, and it works immediately with no extra download.
Why did my iPhone type な instead of ん when I typed n?
A single “n” is read as the start of the な row, waiting to see which vowel follows. For a standalone ん with no vowel, type “nn” or follow the n with a consonant instead of a vowel.
What is the difference between the Romaji and Kana options for Japanese on iPhone?
Both live under the same Japanese entry in Add New Keyboard. Romaji types the sound in Latin letters and converts it live. Kana arranges the actual kana characters on a flick-based layout, which suits someone who already recognises the kana shapes rather than thinking in Latin spelling.
Does typing Japanese need Full Access on iPhone?
No. Typing in any language is unrelated to Full Access. In Kibo, Full Access is read only by the Copy word, Copy line and Paste buttons on the toolbar.
Try it on your own keyboard
Kibo is a free custom keyboard for iPhone with real mechanical key sounds, a wardrobe of themes and RGB backlight effects. No account, no ads, and it works with Full Access left off.