1
counter
word usually written using kana alone
general-purpose counter
suffixed to Japanese numerals 1-9 (ひと, ふた, etc.)
2
counter
word usually written using kana alone
... years old
Other forms
個 【つ】 (rarely used kanji form)
1
conjunction
indicates two contrasting actions
form: ...つ...つ
2
particle
archaic
indicates possessive (often found in place names and compound words)
1
noun (common) (futsuumeishi)
Tsu (city in Mie)
2
suffix
harbour;harbor;port
1
particle
colloquial
called;known as;that
2
transitive verb
colloquial
only applies to
っつ
to say
1
numeric
one
1つが通り過ぎたかと思うと、すぐに次の台風が接近する。
No sooner has one typhoon passed than the next one approaches.
2
noun (common) (futsuumeishi)
for one thing
often used in itemized lists
一つには、私は貧しいし、それにまた忙しくもある。
For one thing, I am poor; for another, I am busy.
3
noun (common) (futsuumeishi)
only
after a noun
4
noun (common) (futsuumeishi)
(not) even
with a verb in negative form
妻の死の知らせを聞いてもまゆ一つ動かさなかった。
He did not even raise an eyebrow at the news of his wife's death.
5
noun (common) (futsuumeishi)adverb (fukushi)
just (e.g. "just try it")
6
nouns which may take the genitive case particle 'no'
some kind of;one type of
Other forms
1つ 【ひとつ】 · 一 【ひとつ】 (irregular okurigana usage)