Ways to say it
| Japanese | Romanization (Wiktionary) | IPA |
|---|---|---|
| 一 | ichi | [it͡ɕi] (narrow) [çito̞] (narrow) |
| 一つ | hitotsu | [çito̞t͡sɨ] (narrow) |
| ワン | wan | [β̞ã̠ɴ] (narrow) |
The word refers to the cardinal number one. While 一 represents the abstract number or is used in specific number sequences, other forms are used for counting. 一つ is a general counter used for counting inanimate objects and can also mean 'one thing'.
Which one should you use?
一 is used for the abstract number or within specific number sequences. In contrast, 一つ is used when counting objects generally, specifically for inanimate objects that are not people. ワン is a loanword from English.
Is there a formal and an informal way to say it?
ワン is an informal version used in casual settings, such as in pop culture or certain brand names.
Related words
How does it change in a sentence?
一つ functions as a general counter for inanimate objects and can also mean 'one thing' in a sentence. To express the impersonal pronoun 'one' (as in 'one thing or person'), the particle の is used in a related way.
How do you pronounce it?
ichi
Did you know?
- While ワン is a loanword for the number one, it is also the Japanese onomatopoeia for a dog barking, similar to 'woof' in English.
- The Japanese word 一つ shares an ancient root with the word for 'person' 人, as both originally derived from a root meaning 'one'.
- In Japanese, the number 'one' 一 is often used to express the idea of 'all' or 'entirety' in specific compound words, such as 一切 meaning 'completely'.
Examples in context
- 一寸先は闇。No one knows what the future holds.This sentence demonstrates the use of 一.Tatoeba #190438 by small_snow, translation #8147543 by CK
- 一つ選んで。Choose one.Tatoeba #3488273 by arnab, translation #883062 by U2FS
- 一言言いたい。Let me say one thing.Tatoeba #190645 by KK_kaku_, translation #433735 by CK
- 497 more sentences on Tatoeba
Example conversation
Ren and Misaki are at a cafe ordering drinks.
- 蓮 Renコーヒーを一杯ください。Kōhī o ippai kudasai.One coffee, please.
- 美咲 Misaki私は紅茶を一杯にします。Watashi wa kōcha o ippai ni shimasu.I'll have one tea.
- 蓮 Renケーキも一皿注文しようか。Kēki mo hitosara chūmon shiyō ka.Shall we order one plate of cake too?
- 美咲 Misakiいいですね。一皿で分けましょう。Ii desu ne. Hitosara de wakemashō.That sounds good. Let's share one plate.
Sources
- Wiktionary, “one” translations and entries 一, 一つ, ワン, CC BY-SA 4.0, dump of 2026-09-26.
- Word origins: Wiktionary entries ワン, 一, CC BY-SA 4.0.
- Example sentences: Tatoeba CC BY 2.0 FR.
