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← Kanji module

N4 · 9 strokes · — · Irodori #336 · Elementary 2 L8

界

boundary, world

✏ Practice writingSRS review
Open KanjiVG SVG

Stroke diagrams © KanjiVG (CC BY-SA 3.0).

Readings

On’yomi
カイ
Kun’yomi
—

Example words

  • 界

    かい

    community; circles

  • 界隈

    かいわい

    neighborhood; neighbourhood

  • 界面活性剤

    かいめんかっせいざい

    surfactant

  • 界面化学

    かいめんかがく

    surface chemistry

Memory aids

Guided learn session →
🧠

How to remember

👁Shape

A 9-stroke character meaning "boundary" — picture the concept as you trace each stroke.

🧩Components

Remember "boundary" (界) by connecting it to its Irodori vocabulary context.

📖Anchor word

世界 (せかい) — your first meeting with this kanji in Irodori.

🔊Readings

First learned in 世界 (せかい) — recall the word to unlock the reading. On'yomi: カイ — common in compound words (熟語).