表層形
一昨夜
オトトイ
名詞
一昨夜 (オトトイ)
Ototoi · おととい — day before yesterday
Other ways to say “day before yesterday” in Japanese →
一昨夜 in rōmaji: ototoi.
名詞
普通名詞
一般
*
📝 一昨日 🔤 * 📐 *
Updated: 2026年8月12日
📖 Grammar Information
| 表層形 (Surface) |
一昨夜
|
|---|---|
| 見出し語 (Lemma) |
一昨日
|
| 読み (Reading) |
オトトイ
|
| 品詞 (POS) |
名詞・普通名詞・一般・*
|
| 活用型 (Conj. Type) |
*
|
| 活用形 (Conj. Form) |
*
|
| 表記 (Orthography) |
一昨夜
|
| 読み・基本形 |
オトトイ
|
| 表記・基本形 |
一昨夜
|
| 見出し語の読み |
オトトイ
|
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一昨夜
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Reading & Info
オトトイ
Lemma: 一昨日
名詞普通名詞一般*
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💡
Did you know · 名詞
名詞 (nouns) are the backbone of Japanese sentences. They can be combined with particles like が, を, に, で to indicate grammatical role.
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❓ About this entry
What is the difference between surface form and lemma? ▼
The surface form (一昨夜) is the exact text as it appeared in the corpus — it may be conjugated or inflected. The lemma (一昨日) is the dictionary base form. For example, 食べた (surface) has the lemma 食べる.
What does the reading (pron) field mean? ▼
The reading shows the pronunciation in hiragana or katakana as recorded by UniDic. For kanji entries this is the standard reading of this specific surface form — which may differ from other readings of the same kanji.
What is UniDic? ▼
UniDic is a comprehensive Japanese lexicon developed by the National Institute for Japanese Language and Linguistics (NINJAL). It provides detailed morphological information for modern Japanese words, used in NLP tools like MeCab.
How do I save this entry? ▼
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