Most learners practise kanji one character at a time, which is a good place to start. But real Japanese is written in words, and most words are compounds, two or more kanji joined to make a single meaning. Practising these compounds, called jukugo, is how you connect the characters you know to the vocabulary you actually use, and it reinforces both at once. Here is how to do it well.
Why compounds matter
Single characters are the building blocks, but words are what you read and write. A compound like the one for school, or train, or telephone, is two or three kanji that combine into an everyday word. If you only ever practise characters in isolation, you can know each one and still hesitate when they appear together as a word, because you never practised the combination. Practising compounds closes that gap, and it has a bonus: every compound is repeated practice of its component characters, in a meaningful context that helps them stick. So compound practice is not separate from character practice; it is character practice with the vocabulary built in.
Compounds are characters you already know
The reassuring thing about jukugo is that you rarely need to learn anything new to write one. A compound is made of single kanji, each of which you can already produce or can learn on its own. So writing a compound from memory is just writing its characters in order, left to right, each in its ordinary stroke order. This is the same decomposition skill we use within complex single characters, applied across a word, and it is why people who can write the components can usually write the compound with little extra effort. If a compound contains a character you cannot yet write, that is simply a single character to practise, as in the best kanji handwriting practice.
Practise compounds from memory
The method is the same producing loop you use everywhere, because recognition is not recall, from recognition versus recall:
- Take a compound word. See its meaning and reading, then hide the characters.
- Write the whole word from memory, each character in order.
- Reveal a guide only when stuck on a character, fix it, and write the word again.
- Let the ones you miss come back sooner with a spaced schedule.
Writing the word, not just the characters, is the point: you are practising the combination and the reading together, the testing effect reinforcing the whole package.
A worked example
Take a common two-kanji word, say the word for electric train, made of the character for electricity and the character for vehicle. You may know each character alone, but practising the compound does three things at once. It drills the electricity character, it drills the vehicle character, and it cements that these two together make the word for train, with its particular reading. Write it from memory a few times, spaced over days, and you have not learned one thing but three: two characters reinforced and a word secured. Do this with the vocabulary from your textbook chapters and your character knowledge and your word knowledge grow together, instead of in separate silos.
Starter compounds from characters you know
The point of compounds is that they reuse characters you can already write. A few to start with:
| Compound | Made of | Meaning |
|---|---|---|
| 日本 | 日 sun + 本 origin | Japan |
| 大学 | 大 big + 学 study | university |
| 先生 | 先 ahead + 生 life | teacher |
| 電車 | 電 electric + 車 car | train |
Each is just two known characters side by side, so practising compounds is mostly recombining writing you already have, not learning from scratch.
How compounds fit your routine
You do not need a separate compound practice; you fold compounds into your normal writing routine. As you meet vocabulary in your reading or textbook, add the compounds to your writing queue alongside single characters, and let spaced review handle the mix. This is especially natural if you study from a course like Genki, where the vocabulary is already organized into words, as we discuss in iPhone flashcards for Genki kanji. For a single-character starting point, see how to write the kanji for water, for a simple first compound, how to write today in kanji, and for the producing method itself, drawing kanji from memory. Kanji Write Practice is built around producing characters and words from memory, free in early access.
Good compounds to start with
If you want a place to begin, start with the compounds you already half-know from everyday vocabulary, because they are made of common characters and you will use them constantly. Words like the ones for school, station, train, telephone, today, and tomorrow are all two-kanji compounds built from very frequent characters. They are ideal first practice for three reasons: the component characters appear in countless other words, so writing them pays off broadly; the words themselves are high-frequency, so the practice is immediately useful; and each compound is only two or three simple shapes, so it is achievable from memory quickly. As you work through a textbook chapter or a vocabulary list, pull out the compounds and add them to your writing queue rather than treating writing as a separate single-character exercise. Over a few weeks, you accumulate both a set of writable characters and a set of writable words, which is what real Japanese actually requires. The single characters give you the alphabet, in a sense, but the compounds give you the language.
