Stand on any street in Japan and read the signs, and a single line can contain four kinds of writing: dense Chinese-derived characters, flowing rounded syllables, sharp angular syllables and, sometimes, plain Latin letters. To a newcomer this looks like chaos. To a Japanese reader it is a precise toolkit in which each script has its own job, much as capital letters, italics and numerals do in English.
This guide explains the four scripts: hiragana, katakana, kanji and romaji. It covers where each came from, what each is used for, how they combine in a sentence, why Japan did not simply replace them with one system, and how a traveler can begin to read signs and menus in a few days of practice.
Kanji are characters borrowed from Chinese, and they were the first writing Japan used. Chinese writing reached Japan during the first millennium, carried along with Buddhist texts and the brush. Each kanji carries meaning: one picture-like character can stand for "mountain," another for "river," another for "fire." The government's list of everyday kanji, the joyo kanji, contained 2,136 characters as of 2010, and children learn about a thousand of them in elementary school.
Most kanji have more than one reading. The on'yomi, or Chinese-derived reading, comes from the original Chinese sound. The kun'yomi is the native Japanese word assigned to the character. The character for mountain, for example, is read "san" in Fuji-san and "yama" when it stands alone. Some kanji were invented in Japan, such as the one for toge, a mountain pass. Because kanji carry meaning, a reader can often grasp a sign's message even when the pronunciation is unknown.
Early Japanese writers used kanji for their sounds alone to write native words, a practice named manyogana after the 8th century poetry anthology Manyoshu. Over time, writers wrote these characters in faster, flowing forms. These cursive forms became hiragana, a set of rounded syllable symbols with 46 basic characters, or 71 with diacritical marks.
Hiragana were long associated with women's writing at the Heian court, which is why they were once called onnade, "women's hand." This history led to a literary golden age: Murasaki Shikibu wrote The Tale of Genji in the early 11th century, in a style that relied on hiragana. Today hiragana are the first script Japanese children learn. They write native words, grammatical particles and the endings of verbs and adjectives.
Katakana also grew from kanji, but in a different way: instead of whole cursive characters, they use parts of kanji. They were developed by Buddhist monks and scholars as a shorthand for marking pronunciation in the margins of Chinese texts. The result is a set of 46 basic symbols with straight, angular lines.
Modern katakana serve several functions. They write foreign loanwords such as coffee or computer, foreign names, scientific terms, and sound effects. They also add emphasis, much as italics do in English, and are common on packaging and menus. When a sign looks a bit like English spoken in a Japanese accent, it is probably katakana, and sounding it out often reveals a familiar word.
Romaji, Japanese written in the Latin alphabet, appears in many places. Train stations show station names in romaji, so travelers can match them with maps. Business cards, brand names, passports and websites use it. Computer and phone users also type Japanese using romaji, and the software converts what they type into kana and kanji.
The most common system is the Hepburn style, which approximates English sounds and is the one used on most signs. Another, called Kunrei, is used in some official settings. Romaji is a bridge for visitors, but it is rarely used in long texts for Japanese readers, who read the mixed script faster. Learning even a few kana makes signs easier to understand.
A typical sentence uses all three main scripts. Nouns and the stems of verbs are written in kanji, which give meaning. Grammar is written in hiragana, including particles that link words and the endings that show tense and politeness. Foreign words are written in katakana. Take a simple sentence about eating sushi in Tokyo: the place name uses kanji, the word for "eat" uses a kanji followed by hiragana endings, and a loanword such as "restaurant" would use katakana.
This system helps readers because Japanese is written without spaces between words. The changes of script mark natural breaks: a switch from kanji to hiragana often shows the end of a word or the start of a grammatical element. Okurigana, the hiragana endings attached to kanji, show how to read the word, and furigana, small kana printed beside a kanji, give the pronunciation in children's books, manga and difficult texts.
The system is also flexible for creative use. Writers choose a script to set a tone: a word in hiragana can feel soft, the same word in katakana can feel modern or technical, and kanji can feel formal. Brand names, advertisements, manga titles and song titles all play with this effect, and a company may choose a script to give its product a certain personality. Skilled readers notice these choices instantly, as English readers notice capital letters or fonts.
The mix grew from history. Kanji came first, then Japanese writers developed kana to write the grammar and native words that Chinese characters did not fit. Rather than choosing one script, Japanese kept all of them because each does something useful. Kanji compress meaning into small spaces, so a headline fits a few characters. Kana make grammar flexible and add a graceful rhythm.
Japanese texts can run in two directions. Traditional writing, called tategaki, runs in vertical columns from top to bottom and from right to left, as in many novels, newspapers and manga. Modern yokogaki runs horizontally from left to right, as in most websites and textbooks. Visitors may see both in a single day, sometimes on the same sign. Knowing the difference helps in knowing where to start reading.
There is also a practical benefit for foreign visitors in how loanwords work. Japanese has absorbed thousands of words from English, French, German and Portuguese, and katakana makes them visible. A word like "terebi" is easy to decode once the sounds are known, and it can be a pleasant surprise to discover how many words are familiar. The sounds are adapted to Japanese pronunciation, so "McDonald's" becomes something closer to "makudonarudo," but the connection is clear.
A traveler can make quick progress. Learning the 46 hiragana and 46 katakana takes many people a week or two of short daily practice, and it makes menus, station signs and shop names far more readable. Katakana are especially useful, since many menu items, such as ice cream, pizza and coffee, are loanwords. Apps that translate text through a phone camera can help with kanji.
Look for patterns in the street. Characters for "entrance," "exit," "open," "closed" and "station" repeat everywhere, and they are worth memorizing. Many shops put the same words in more than one script, so comparing them is a natural lesson. Bookstores sell workbooks for beginners, and free online lessons are widely available. A few weeks of practice before a trip changes how the streets look.
Japanese writing system on Wikipedia