How to Type in Japanese: Romaji Input, Step by Step

Typing Japanese is the fastest way to make kana stick — and the setup takes about two minutes. This guide gets your keyboard working first, then explains the rules, because the rules only make sense once you have somewhere to try them.

Here is the whole thing in one line: install a Japanese input method, set it to romaji input, and type the romanization of what you hear. Everything below is detail.

The answer, in five rules

If you only remember five things, remember these. They cover the overwhelming majority of ordinary Japanese sentences.

Those last two need unpacking, and the reason is the single most confusing thing about typing Japanese.

There are two different romaji, and everyone conflates them

This is where most beginners get stuck, and almost no tutorial addresses it directly.

Romaji as pronunciation. How a word is said, written in Latin letters. これは is kore wa. The particle は is pronounced "wa".

Romaji as keystrokes. What you actually press to get a kana out of a Japanese input method. To make the character は appear, you type ha — because は is the kana in the は-row, and its name-romaji is "ha".

So the same character has two different romanizations depending on what question you're asking:

Beginners who have learned that "は is pronounced wa" then type wa and get わ, and conclude their keyboard is broken. It isn't. You type the kana's own romaji; the pronunciation is a separate layer that happens to disagree for exactly two particles.

Once you know that, typing Japanese stops being mysterious. It is just spelling — with two spellings per word, one for your hands and one for your mouth.

Setting up the keyboard

You need a Japanese input method, usually called an IME (Input Method Editor). Every major operating system ships one for free. You do not need to buy a Japanese keyboard — a US layout works fine, and is what most learners use.

Windows

Settings → Time & language → Language & region → Add a language → search 日本語 / Japanese → install. The Microsoft IME appears automatically.

Switch into it with Windows key + Space (cycles your installed languages) or **Alt + ** (the backtick key, which toggles the IME on and off). The あ/A` indicator in the taskbar tells you which mode you are in. あ means kana mode — keystrokes become Japanese. A means direct input — keystrokes stay English.

macOS

System Settings → General → Language & Region → + → Japanese → Add. Leave "Romaji" checked in the input-source list.

Switch with Control + Space, or the globe (🌐) key on Apple keyboards, or the input menu in the menu bar. macOS also gives you a Kana input source — leave that one out unless you specifically want it; romaji input is easier to learn.

iPhone and iPad

Settings → General → Keyboard → Keyboards → Add New Keyboard → Japanese. You will be offered two layouts, and the choice matters:

• かな入力 (Kana) — the 12-key flick keyboard. This is what most Japanese people actually use on a phone.
• ローマ字入力 (Romaji) — the familiar QWERTY layout.

Pick one, or install both: with two Japanese keyboards enabled you can swipe across the space bar to switch. Flick input is genuinely fast once learned, and has its own guide: how to type Japanese on an iPhone.

Android

Settings → System → Languages & input → On-screen keyboard → Gboard → Languages → Add keyboard → 日本語. Gboard offers the same two choices: 12-key (flick) or QWERTY (romaji).

The physical keyboard question

If you are buying a keyboard, you will see "JIS" and "US" layouts. JIS keyboards add a few keys (変換, 無変換, ひらがな/カタカナ) and move symbols like @ and " to different positions. A US keyboard types Japanese perfectly well — you just use the software shortcut to switch input modes instead of a dedicated key. Unless you are also using Japanese hardware or need the physical kana legends, US layout is the better choice: the symbol positions match everything else you do.

The romaji rules, in full

Small っ

A small っ is a one-beat pause. In romaji, double the consonant that follows it.

This is why a word can look like it has a doubled consonant that isn't in the dictionary form. 待つ (matsu, to wait) becomes 待って (matte).

ん

Type nn. This always works.

The trap: n alone is fine before a consonant (しんぶん → shinbun), but before a vowel or y a single n gets read as the start of the next syllable. しんいち typed as shinichi produces しにち — a different word. You need shinnichi or shin'ichi.

If you remember one rule about ん, make it this: when in doubt, type nn. It is never wrong.

Long vowels

The ー mark extends the vowel before it. In romaji you repeat that vowel:

A long o that comes from the o-row plus う is written ou, not oo: とうきょう → toukyou, ありがとう → arigatou, おう → ou. You will also see this written tōkyō, Tōkyō or Tokyo elsewhere — same sound, three conventions. ou is the one that matches what you type.

The alternative spellings

Japanese has competing romanization systems, so input methods accept more than one spelling for several syllables. Both forms work in every mainstream IME:

Small kana you can type with an x or l prefix: ぁ = xa or la, ゃ = xya or lya. And づ is du, ぢ is di — rare, but they show up in words like 続く (tsuzuku) and 鼻血 (hanaji).

The classic hard word

出張 — a business trip — is しゅっちょう. Break it apart and it is unambiguous:

• しゅ → shu
• っ → double the next consonant
• ちょ → cho... but the doubled consonant means ccho
• う → u

So: shucchou. Every "impossible" word falls apart the same way. Break it into kana, apply the rules, and reassemble.

A real sentence, keystroke by keystroke

Take 昨日は映画を見ました — "I watched a movie yesterday."

Notice the divergence on line two: read wa, typed ha. That is the whole two-romaji problem in a single line, and once it clicks you will stop fighting your keyboard.

After typing, most IMEs show hiragana and you press Space to convert to kanji, then Enter to confirm. On a phone you tap the candidate in the conversion bar.

Should you type in romaji or kana?

Romaji input (shinsetsu) or kana input (かな入力, one key per kana on a JIS keyboard)? Learn romaji first, and for most learners, only.

Kana input needs a JIS keyboard to be practical, takes longer to learn, and saves very little for a beginner. Romaji input works on any hardware, matches every textbook's romanization, and the muscle memory transfers to your phone. There is more on the tradeoffs in romaji vs kana input.

Why this is worth two minutes of setup

Reading kana is recognition. Typing kana is production. They are different skills, and production is the one that makes the character feel like yours — you cannot type a word you have not decomposed into sounds.

This is not a study trick layered on top of learning Japanese. Typing is the closest thing to a free lunch in early language learning: you get spelling, sound, and recall practice in one pass, with a keyboard you already own.

Two honest caveats. Typing does nothing for your listening or your speaking, and it will not teach you to write kanji by hand — if you need handwriting, writing practice is a separate track. And typing romaji is not the same as reading Japanese: at some point you have to stop leaning on the Latin alphabet and read kana directly, which is what hiragana and katakana is for.

Where to start

Set the keyboard up now, while you are thinking about it — it is the step people put off for weeks.

Then type something. Anything. Start with the kana chart on our interactive kana table, where every character shows its romaji and plays its sound, then move to romaji typing practice to work through whole sentences rather than single characters.

The romaji converter at romaji.live/tools/romaji will romanize any Japanese sentence you paste in, so you can check yourself against the standard reading — including the particles that are read differently from how they are typed.

If something is still not working, the fix is almost always one of a handful of known issues: Japanese IME troubleshooting.