First opened Saturday, August 8, 2009
一月
ひとつき
Pitch accent: We don't have the data for this section. No accent list gives this spelling and reading, or the two we check against disagree.
one month
A single month, ひとつき, may be an old “one month” — and Chinese-derived readings of the same spelling sit alongside it.
Taken apart
Select a part to see every word so far that is taken apart with it.
In a sentence
We don't have the data for this section. The pinned Tatoeba export has no sentence with a translation that uses this word and passes our filter.
What Wiktionary says
Quoted line by line from Wiktionary's Etymology section for this reading, taken from one dated dump so it can't change underneath us. Nothing below is paraphrased.
Not settled
Wiktionary itself hedges on part of this word's origin — those lines are marked below.
- Hedged“Possibly from Old Japanese.”
- “Compound of 一 (hito, “one”) + 月 (tsuki, “month”).”
Source: Wiktionary: 一月 (dump of 2026-09-02), available under CC BY-SA 4.0. Reading, meaning and part of speech from JMdict, and kanji readings from KANJIDIC2 (EDRDG).
Other readings of 一月 on the same Wiktionary page
These describe other words written the same way, not ひとつき. They are quoted for context: the parts, layer and processes of this word are not taken from them.
いちがつ
- “From 一 (ichi, “one”) + 月 (-gatsu, “month”).”
いちげつ
- “Compound of Middle Chinese-derived elements 一 (ichi, “one”, 呉音 (goon, literally “Wu-sound”) reading) + 月 (getsu, “moon, month”, 漢音 (kan'on, literally “Han-sound”) reading).”
What the labels mean
- 和語 Native Japanese
- Words that were already Japanese before Chinese vocabulary arrived — usually written with kun'yomi and often short.
- Compound
- Two or more words or stems joined into one.