First opened Friday, September 28, 2007
一昨日
いっさくじつ
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.
day before yesterday
Issakujitsu is 一昨 (issaku-, “the previous... before...”) plus 日 (jitsu, “day”), first cited to a text from 1275.
Taken apart
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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.
- “Compound of 一昨 (issaku-, “the previous... before...”) + 日 (jitsu, “day”).”
- “First cited to a text from 1275.”
Source: Wiktionary: 一昨日 (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 一昨日 on the same Wiktionary page
These describe other words written the same way, not いっさくじつ. They are quoted for context: the parts, layer and processes of this word are not taken from them.
おととい
- “/wotot͡sufi/ → /wototofi/ → /wototowi/ → /ototoi/”
- “First cited to a text from roughly 953.”
- “Shift from Old Japanese ototsui (see Etymology 3 below).”
- “The kanji spelling is from issakujitsu (see Etymology 1 above).”
おとつい
- “⟨woto₂ tu pi₁⟩ → */wotətupʲi/ → /wotot͡sufi/ → /otot͡suwi/ → /otot͡sui/”
- “First attested in the Man'yōshū (c. 759 CE).”
- “Originally a compound of 遠 (oto, “distant, distant past”) + つ (tsu, Old Japanese case-marker particle) + 日 (hi, “day”).”
- “The kanji spelling is from issakujitsu (see Etymology 1 above).”
What the labels mean
- 漢語 Sino-Japanese
- Words built from Chinese-derived morphemes — borrowed from Chinese or coined in Japan out of Chinese parts — read with on'yomi.
- Compound
- Two or more words or stems joined into one.