壱 — “One (in Documents)” in Japanese

Master (高手)いち, いつ, ひとつ

Radical ⼠ · radical 33 The building block this kanji is filed under

“One (in Documents)” in Japanese is 壱, read ichi, itsu, hitotsu (いち, いつ, ひとつ). 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 壱万円 (ten thousand yen, formal).

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What does 壱 mean?

Full details, readings & example

Kanji	壱
Meaning	One (in Documents)
Readings	いち, いつ, ひとつ
Grade	Master (高手 · secondary school)
Curriculum	Jōyō kanji · Japanese secondary school (JLPT N1–N2)
Example	壱万円 (ten thousand yen, formal)

How to read 壱

壱 is read ichi (いち) or itsu (いつ) or hitotsu (ひとつ) depending on the word.

Words with 壱

壱万円

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Kanji read the same way as 壱

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

Updated: 2026-08-28