# Radicals: breaking a kanji down to remember it

> What a radical (部首) is, why it often carries the kanji's meaning, where it sits, and how this lens turns a 15-stroke block into a readable assembly.

- Page: https://www.darumoji.com/en/guide/kanji-radicals
- Content written by Darumoji: https://www.darumoji.com
- Published 2026-06-16

A 15-stroke kanji looks impassable seen as one block. Seen as an assembly of a few familiar bricks, it becomes readable, memorable, sometimes even predictable. That lens has a name: radicals.

**海 (うみ / かい)**: On the left, the 氵 (さんずい) radical: this kanji is about water.

## What a radical is

A radical (`部首`, ぶしゅ) is the base element used to file a kanji in a dictionary, a bit like the first letter of a word for us. There are **214 standard ones**, inherited from the Chinese Kangxi dictionary (1716), still the backbone of Japanese dictionaries today.

## The radical often carries the meaning

Most kanji are **phono-semantic compounds** (`形声文字`, けいせいもじ): one part hints at the meaning (the radical), the other at the pronunciation. The radical `氵` (さんずい, "water") shows up in `海` (うみ, sea), `河` (かわ, river), `池` (いけ, pond), `泳` (およぐ, to swim). Spot it and you already know the kanji touches water or liquid.

> **A tendency, not a guarantee** Among everyday Japanese kanji, about **60%** follow this phono-semantic pattern (the share climbs to 80-90% across all Chinese characters). The radical points toward a meaning domain, it doesn't always guarantee it.

## Where the radical sits

The radical's position has a name. Seven cases come up constantly:

- **偏 (へん)**: On the left. The 氵 (さんずい) radical in 海 (うみ, sea).
- **旁 (つくり)**: On the right. The 頁 (おおがい) radical in 頭 (あたま, head).
- **冠 (かんむり)**: On top. The 宀 (うかんむり) radical in 家 (いえ, house).
- **脚 (あし)**: At the bottom. The 心 (こころ) radical in 思 (おもう, to think).
- **構え (かまえ)**: As an enclosure. The 門 (もんがまえ) radical in 間 (あいだ, interval).
- **垂れ (たれ)**: Hangs from the top down the left. The 广 (まだれ) radical in 店 (みせ, shop).
- **繞 (にょう)**: Wraps the bottom and left. The 辶 (しんにょう) radical in 道 (みち, road).

## Why it changes everything

- You memorize by **assembly**, not stroke by stroke: `林` (はやし, grove) = two `木` (き, tree), `森` (もり, forest) = three `木`.
- You **guess** an unknown kanji's domain from its radical.
- You **look up** a kanji in a dictionary or by handwriting without knowing its reading.

> **Remember** A kanji isn't a drawing to memorize whole, but an **assembly of radicals** (`部首`, ぶしゅ). Spot the radical: it files the character and, most of the time, signals its meaning domain.

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