First opened Friday, September 25, 2009
二十日
はつか
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.
twenty days, twentieth (day of the month)
The twentieth of the month has two likely derivations — one through “twenty years old”.
Taken apart
No breakdown is shown for this word: Wiktionary's text for it doesn't give a split that spells the word and joins to its reading, and any other split would be a guess.
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“Two likely derivations:”
- “* From 二十(はた) (hata, “twenty”, by way of apophonic form hatsu-) + 日(か) (-ka, counter for days), or”
- “* A shift from 二十(はた)歳(ち) (hatachi, “twenty (years old)”) + 日(か) (-ka, counter for days):”
- “*: /ɸatat͡ɕi ka/ → */ɸat̚t͡ɕɨka/ → /ɸat͡ɕuka/ → /hat͡ɕuka/”
Source: Wiktionary: 二十日 (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 二十日 on the same Wiktionary page
These describe other words written the same way, not はつか. They are quoted for context: the parts, layer and processes of this word are not taken from them.
にじゅうにち
- “From 二十 (nijū, “twenty”) + 日 (nichi, “days”).”
What the labels mean
- Sound change
- The pronunciation shifted over the centuries.