The languages of Japan: what is spoken, how it is written, and why it matters

I have spent close to thirty years around this language as a buyer and supplier of translation, and the same misunderstanding comes up again and again. People assume that because almost everyone in Japan speaks one language, Japanese must be simple to translate. The opposite is true. What follows is the plain version: which languages are actually spoken, how the written language works, and the handful of facts that explain why Japanese rewards precision and punishes the generic.

What languages are spoken in Japan

Japanese is the answer to the obvious question, spoken by almost the entire population. Unusually, it holds that position without a law behind it. Japan has no statute naming an official language. Japanese simply functions as the national language in government, education and the media, in a standardised form built on the old Tokyo dialect during the modernisation of the Meiji era.

Beneath that surface the picture is richer. Linguists at Ethnologue count roughly fifteen languages in Japan once the indigenous tongues and the main varieties are separated out. The most significant of these are the Ryukyuan languages of Okinawa and the Amami islands, a distinct branch of the Japonic family rather than dialects of Japanese. They are not mutually intelligible with standard Japanese, nor reliably with each other, and they carry names most outsiders never hear: Okinawan, Kunigami, Amami, Miyako, Yaeyama and Yonaguni.

Then there is Ainu, the language of the indigenous people of Hokkaido. It is a language isolate, related to nothing else on the map, and it is all but gone. By 2021 there were effectively no native speakers left, only a small number of semi-speakers and a growing band of learners working to bring it back. UNESCO listed eight endangered languages in Japan in its 2009 atlas, the Ryukyuan group together with Ainu and Hachijō, and Ainu sat at the most severe level short of extinct.

One practical point follows, and it is reassuring. For almost any commercial purpose the target is standard Japanese, a single, well-defined form understood across the country, so you are not choosing between dialects or weighing up minority languages when you commission work. Publishing into Ryukyuan or Ainu is vanishingly rare and tends to be academic or cultural rather than commercial.

How Japanese is written

Modern Japanese uses three scripts at the same time, and a single sentence routinely contains all three. That is the part that catches people out.

Kanji are the characters borrowed from Chinese, and they carry the core meaning of most words. There are tens of thousands in existence, but the set an educated adult is expected to know, the jōyō kanji defined by the government, runs to 2,136. Many of these characters hold more than one pronunciation and more than one meaning, settled only by the word they appear in.

Hiragana is the rounded, flowing script. It has forty-six basic characters and handles native Japanese words, grammatical endings and the small connective parts that hold a sentence together. Katakana, angular where hiragana is curved, has its own forty-six characters and is reserved mainly for foreign loanwords, technical terms and emphasis, rather as we might use italics.

The choice between these scripts is not decorative, and this is where the old idea of Japanese as merely "a different alphabet" breaks down. Writing a word in katakana that belongs in hiragana shifts its tone. Putting a foreign brand name into katakana involves real decisions about sound, spacing and style that affect how the brand is read. None of this has an English equivalent, and a non-native eye cannot see where the lines should fall, because standard Japanese is written without spaces between words.

A few things worth knowing about the language itself

Beyond the script, Japanese behaves in ways that reshape any translation rather than simply re-dress it.

The verb comes last. Japanese is a subject-object-verb language, so the main action arrives at the end of the sentence, after the qualifications and clauses that lead up to it. A statement can be reversed or softened by its final word, which means a translator often cannot resolve a line until they reach its end. It also builds meaning by adding endings to verb stems, stacking grammar where English would use separate words.

It leaves a great deal unsaid. There are no articles, no grammatical gender, and number is usually implied rather than marked. Much of what English states outright, Japanese carries through context. Counting alone is a small ordeal, since the word for a number changes depending on what is being counted, flat things, long things, people, animals, each with its own form.

And then there is keigo, the system of honorific speech. Japanese encodes the relationship between speaker, listener and subject directly into its verbs and vocabulary, across distinct levels of respect and humility. Use the wrong level in a business letter or customer message, and a Japanese reader will take it as proof that no one who understood the culture was involved.

Why this matters when you translate

Put these together and the conclusion is hard to avoid. Japanese is not a language you convert word by word and tidy up afterwards. The script choices, the reordered sentences and the calibration of formality all have to be rebuilt by someone writing as a native, for a readership with famously high expectations of written quality. Text that is grammatically correct but socially miscalibrated still fails, and a Japanese reader spots it at once.

That is specialist work, and it is the difference between content written for a Japanese audience and content merely turned into Japanese. If that is the standard you need, you can see how we approach it on our Japanese translation services page.