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一 means 'one'

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Stroke : 1    Radical number: 1    Frequency: 2   JLPT: N5    Usefulness: 1    Study set: 1-1    Grade: 1   Intermediate lesson: 1    Beginner lesson: 1   Begins 1548 words   Used in 2077 words   Used in 8019 names   Component in 7061 kanji (974 Jōyō)
Jōyō (常用)
Common readings
On
   イチ   イツ
Kun
   ひとつ   ひと- one
Additional readings
Name    かず   い   いっ   いる   かつ   かづ   てん   はじめ   ひ   ひとつ   まこと
Variants
⼀ (Chinese)  
Notes
Find out when to spot this radical in a kanji (rarely) and when not to (the majority of the time). Also see when it actually means 'one' in an etymology, as it does for 与 (grant).
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Most useful words by reading
In the most useful 10,000 words in Japanese, 一 is used 108 times, read 3 ways (with 1 variation). 4 words use a non-standard reading.
Across all words in Japanese, 一 is used 1993 times, read 3 ways (with 2 variations). 5 words use a non-standard reading.
Showing:
イチ (read as いっ) : 874 words FIND ALL
い っ し ょ 0
adverbial noun (fukushitekimeishi), noun, 'no' adjective
1. together  (see also: 御一緒)
2. at the same time
(click the word to view an additional 1 meaning and 2 forms, examples and links)
イチ : 713 words FIND ALL
い ち ど 3 い ち ど 2 い ち ど 0
adverbial noun (fukushitekimeishi)
1. once; one time; on one occasion
2. temporarily; for a moment  (this meaning is restricted to reading ひとたび)
(click the word to view an additional 1 reading, 1 meaning and 6 forms, examples and links)
イツ : 104 words FIND ALL
ど う い つ 0
1. identical; same; one and the same; equal
2. fair; equal treatment; without discrimination
(click the word for examples and links)
ひとつ : 295 words FIND ALL
ひ と り 2
noun
1. one person  (esp. 一人)
2. alone; unmarried; solitary  (esp. 独り; this meaning is restricted to reading ひとり)
(click the word to view an additional 1 reading and 4 forms, useful expressions, examples and links)
ひとつ (read as ひとつ) : 2 words FIND ALL
Most common form: 一に掛かって
expression
depends entirely on; depends above all on
(click the word to view an additional 1 reading and 3 forms, examples and links)
Part of a non-standard reading: 5 words. FIND ALL
つ い た ち 2
noun
1. first day of the month  (usu. 一日 or １日)
2. first ten days of the lunar month  (archaic; this meaning is restricted to reading ついたち)
(click the word to view an additional 1 reading and 5 forms, examples and links)
An additional 1 less common words include 一 but the readings have not yet been categorized.
Quick links
QUICK SEARCH WORD SEARCH KANJI SEARCH COMPONENT SEARCH Find kanji that refer to 一
More information
Wiktionary ⇗ | Unicode.org ⇗ | Google Japan ⇗ | Hanziyuan etymology ⇗
Additional data
Henshall: 1 (originally: 1)  Joy o' Kanji : 1  Key to Kanji: 24 

Cascading kanji view

一
イチ   イツ   ひとつ    ひと- one   
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