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Kanji Radicals: The Building Blocks Explained

26 May 2026 · Mozhippattru Japanese Language School

A radical is a recurring component inside kanji. Learning the common ones is the biggest shortcut in your kanji journey.

Why radicals help

Instead of seeing 20 random strokes, you start seeing familiar parts. 休 (rest) is 人 (person) + 木 (tree) — a person resting by a tree. Meaning becomes memorable.

Common radicals to know

  • 氵(water) — appears in 海 (sea), 河 (river), 泳 (swim)
  • 木 (tree/wood) — 林 (woods), 森 (forest)
  • 人 / 亻 (person) — 休 (rest), 体 (body)
  • 口 (mouth) — 話 (speak), 歌 (song)
  • 心 / 忄 (heart) — 思 (think), 感 (feel)

Radicals and the dictionary

Traditional dictionaries organise kanji by radical, so knowing them also helps you look up unfamiliar characters.

Learn a few radicals each week and watch new kanji start to “make sense” instead of looking random.

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