Japanese symbol for “intracranial”

頭蓋内

ずがいない

Romaji: zugainai

intracranial; endocranial

In Japanese, intracranial is 頭蓋内, read ずがいない (zugainai).

Before using these characters for a tattoo, check them with a native speaker. Dictionary words often have several meanings, and the right choice depends on context.

Meanings

adj-no intracranial; endocranial

Kanji and stroke order

頭

head, counter for large animals

on: トウ、ズ、ト
kun: あたま、かしら、-がしら、かぶり

16 strokes · JLPT 3

蓋

cover, lid, flap

on: ガイ、カイ、コウ
kun: ふた、けだ.し、おお.う、かさ

13 strokes

内

inside, within, between

on: ナイ、ダイ
kun: うち

4 strokes · JLPT 2

Related words

Words that share a kanji.

Word	Reading	Meaning
冒頭	ぼうとう boutou	beginning; opening; start
先頭	せんとう sentou	head (of a line, group, etc.); front; lead
頭痛	ずつう zutsuu	headache
街頭	がいとう gaitou	(on the) street
頭脳	ずのう zunou	head; brains
念頭	ねんとう nentou	(on one's) mind; heed
頭蓋骨	ずがいこつ zugaikotsu	skull; cranium
頭蓋	ずがい zugai	cranium; skull
内容	ないよう naiyou	contents; content; substance

Data: JMdict (CC BY-SA 4.0); KANJIDIC2 (CC BY-SA 4.0); KanjiVG (CC BY-SA 3.0); wordfreq (CC BY-SA 4.0 (data)). Retrieved 2026-10-22.