恒 — “Constancy / Always” in Japanese

Master (高手)こう, つね, つねに

Radical ⼼ · radical 61 The building block this kanji is filed under

“Constancy / Always” in Japanese is 恒, read kou, tsune, tsuneni (こう, つね, つねに). 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 恒星 (fixed star).

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What does 恒 mean?

Full details, readings & example

Kanji	恒
Meaning	Constancy / Always
Readings	こう, つね, つねに
Grade	Master (高手 · secondary school)
Curriculum	Jōyō kanji · Japanese secondary school (JLPT N1–N2)
Example	恒星 (fixed star)

How to read 恒

恒 is read kou (こう) or tsune (つね) or tsuneni (つねに) depending on the word.

Words with 恒

恒星

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Kanji read the same way as 恒

Same sound, different character — the classic trap. Compare them side by side:

Updated: 2026-08-28