介 — Jammed In / Shellfish / Mediate / Concern Oneself With

Master (高手)かい

Radical ⼈ · radical 9 The building block this kanji is filed under

介 (readings: かい; Japanese kanji) means “Jammed In / Shellfish / Mediate / Concern Oneself With”. It is a Jōyō kanji taught in Japanese secondary school (junior & senior high) — the 高手 · Master tier beyond the grade 1–6 Kyōiku set, and appears in words such as 紹介 (introduction).

Try it now

What does 介 mean?

Full details, readings & example

Kanji	介
Meaning	Jammed In / Shellfish / Mediate / Concern Oneself With
Readings	かい
Grade	Master (高手 · secondary school)
Curriculum	Jōyō kanji · Japanese secondary school (JLPT N1–N2)
Example	紹介 (introduction)

How to read 介

介 is read かい depending on the word.

Words with 介

紹介giới thiệu

Learn 介 in real sentences — free

Read stories and news built from only the kanji you already know. KanjiSchool’s path covers all 2,136 Jōyō kanji — 1,026 ready to learn now.

Start free — no credit card →

Updated: 2026-07-22