Japanese Kanji Guide — Radicals, Stroke Order & Memory Techniques [JLPT N5]
Content by NTJ Kuma · Nihongo to Japan editorial team · Updated July 27, 2026
Don't cram kanji — break them down by radical, use association and context to remember them faster.
Learning Kanji: Don't Memorize — Decompose!
Many people learn kanji by copying them over and over. That's inefficient — there are 2,136 jōyō kanji; rote-memorizing them all takes years. This guide teaches three efficient methods: radical decomposition, mnemonic association, and contextual learning — to memorize 3× the kanji in 1/3 the time.
Why You Shouldn't Rote-Memorize Kanji
| Method | Retention | Time efficiency |
|---|---|---|
| rote copying | low (easily forgotten) | low |
| radical decomposition | medium | medium |
| mnemonic stories | high | medium |
| contextual (in sentences) | highest | high |
The Radical System: a Kanji's ‘Genes'
| Radical | Meaning | Kanji containing it |
|---|---|---|
| 氵 (water) | water-related | 海・湖・河・泳・波 |
| 火 (fire) | fire-related | 燃・焼・炎・灯 |
| 木 (tree) | plant-related | 森・林・根・桜 |
| 人 (person) | person-related | 休・仕・何・体 |
| 口 (mouth) | mouth/speech-related | 語・話・呼・叫 |
| 目 (eye) | eye-related | 見・眠・眼・盲 |
| 手 (hand) | hand-related | 持・打・抱・投 |
| 足 (foot) | foot-related | 走・跳・踏・跡 |
| 山 (mountain) | mountain-related | 岡・崖・峰・岩 |
| 日 (sun/day) | time-related | 明・晴・暗・曜 |
Guessing Meaning from Radicals
Practice ‘see the radical, guess the meaning':
- 「温」: 氵(water) ＋ 日 ＋ 皿 → 温度 = temperature (of water)
- 「植」: 木 ＋ 直 → 植える = to plant (a tree thing)
- 「話」: 言 ＋ 舌 → 話す = to speak (a speech thing)
- 「晴」: 日 ＋ 青 → 晴れる = to clear up (sun-related)
- 「泳」: 氵 ＋ 永 → 泳ぐ = to swim (a water action)
Stroke Order: Why It Matters
Correct stroke order makes handwriting faster, makes shapes easier to remember, and makes reading handwriting easier. Basic rules:
1. Top to bottom: 三 (一→二→三)
2. Left to right: 川
3. Horizontal before vertical: 十 (一→丨)
4. Outside before inside: 国 (frame → 王 → close)
5. Center first: 小 (丨→left dot→right dot)
The 50 Most Important N5 Kanji
| Kanji | On'yomi | Kun'yomi | Meaning |
|---|---|---|---|
| 日 | にち・じつ | ひ・か | day, sun |
| 月 | げつ・がつ | つき | month, moon |
| 年 | ねん | とし | year |
| 時 | じ | とき | time |
| 人 | じん・にん | ひと | person |
| 子 | し・す | こ | child |
| 女 | じょ | おんな | woman |
| 男 | だん・なん | おとこ | man |
| 大 | だい | おお（きい） | big |
| 小 | しょう | ちい（さい） | small |
| 中 | ちゅう | なか | middle, inside |
| 上 | じょう | うえ | above |
| 下 | か・げ | した | below |
| 山 | さん | やま | mountain |
| 川 | せん | かわ | river |
| 木 | もく | き | tree |
| 火 | か | ひ | fire |
| 水 | すい | みず | water |
Mnemonics: Tell Each Kanji a Story
- 「明」: 日 (sun) ＋ 月 (moon) = bright → ‘sun and moon shining together = bright'
- 「休」: 人 ＋ 木 (tree) = rest → ‘a person leaning against a tree'
- 「林」: 木 ＋ 木 = grove → ‘two trees = a small grove'
- 「森」: 木 ＋ 木 ＋ 木 = forest → ‘three trees = a big forest'
- 「岩」: 山 ＋ 石 = rock → ‘a stone on a mountain = a boulder'
JLPT Kanji Requirements
| Level | Kanji count | Notes |
|---|---|---|
| N5 | ~80 | basics: numbers, family, places |
| N4 | ~300 | N5 plus everyday vocab kanji |
| N3 | ~650 | medium-complexity kanji |
| N2 | ~1000 | news/written kanji |
| N1 | ~2000 (all jōyō) | nearly all common-use kanji |
Recommended Learning Tools
| Tool | Use | Feature |
|---|---|---|
| Anki | flashcard memory | spaced-repetition algorithm, free |
| WaniKani | kanji learning | starts from radicals, paid |
| KanjiStudy (app) | kanji practice | stroke-order animations |
⚠️ Where learners slip up
① One kanji, many readings. The real hurdle isn't the meaning but the readings — a single kanji has several on'yomi and kun'yomi (生: せい・しょう・い（きる）・う（まれる）…). Learn kanji in words, and focus on how each word is read.
② On'yomi vs kun'yomi, roughly. Multi-kanji compounds usually take on'yomi (学校 = がっこう); a lone kanji, or one with kana okurigana, usually takes kun'yomi (学ぶ = まなぶ, 山 = やま). Plenty of exceptions.
③ False friends. 手紙 means “letter,” not toilet paper; 勉強 means “study”; 大丈夫 means “it's fine.” If a compound looks familiar, confirm the Japanese meaning.
💡 Quick takeaway
Don't try to “learn all the kanji” as isolated symbols — that's the slow road. Learn them inside high-frequency words, and drill the reading, not just the shape. Recognizing 「学校 = がっこう = school」 in context beats writing 学 a hundred times. Modern Japanese is mostly typed, so recognizing and reading matters more than handwriting — practice writing only the common ones.
❓ FAQ
Q: How do I know whether to use on'yomi or kun'yomi?
Rough rule: compounds (two-plus kanji) usually take on'yomi (学校 = がっこう); a lone kanji, or one with kana okurigana, usually takes kun'yomi (学ぶ = まなぶ, 山 = やま). Many exceptions — memorize new words as you meet them.
Q: Should I learn to write or to recognize first?
Since Japanese is mostly typed today, recognizing and reading beats handwriting. Front-load recognition of frequent kanji words and their readings; practice writing only the common ones.
🖊️ Practice Quiz
Q1. The radical 「氵」 (three-water dots) is usually related to what?
(A) fire (B) water (C) wood (D) mountain
Q2. Which two parts make up the kanji 「休」?
(A) 人 ＋ 木 (B) 人 ＋ 大 (C) 月 ＋ 木 (D) 人 ＋ 山
Q3. What is the composition of 「明」?
(A) 日 ＋ 月 (B) 火 ＋ 月 (C) 日 ＋ 日 (D) 日 ＋ 大
Q4. About how many kanji are needed for JLPT N5?
(A) about 50 (B) about 80 (C) about 300 (D) about 1000
Q5. What is the most efficient way to learn kanji?
(A) copy each kanji 100 times
(B) break down by radicals ＋ mnemonic association ＋ use them in sentences
(C) memorize only on'yomi, ignore kun'yomi
(D) memorize 2000 kanji first, then learn grammar
Answer Key
1. (B) water ── 氵 is the radical form of 「水」 (water); kanji with 氵 mostly relate to water: 海・泳・波・湖.
2. (A) 人 ＋ 木 ── 休 = a person (人) leaning against a tree (木) = rest.
3. (A) 日 ＋ 月 ── 明 = sun (日) ＋ moon (月) = bright.
4. (B) about 80 ── N5 needs around 80-100 basic kanji.
5. (B) ── breaking down by radicals + mnemonics + using them in sentences is the most efficient; rote copying alone is inefficient.