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Quintuple VS

Synonym Boundary: "日", "曜日", "おととい", "明後日", "一昨日"

All represent the core concept "day", but require precise selection.

Japanese Option A

ひ / にち / か (hi / nichi / ka)
N5 / CEFR
Japanese Option B

曜日

ようび (youbi)
N5 / CEFR
Japanese Option C

おととい

おととい (ototoi)
N5 / CEFR
Japanese Option D

明後日

あさって (asatte)
N5 / CEFR
Japanese Option E

一昨日

おととい (ototoi)
N4 / CEFR

Quintuple VS Nuance Contrast & Social Differences

When expressing "day" in Japanese, you must carefully distinguish between "日", "曜日", "おととい", "明後日", "一昨日" based on context.
  • (ひ / にち / か (hi / nichi / ka) - Level: N5): Maps to "day, sun" and is used when Has multiple readings: 'hi'.
  • 曜日 (ようび (youbi) - Level: N5): Maps to "day of the week" and is used when Used to ask or state which day of the week it is.
  • おととい (おととい (ototoi) - Level: N5): Maps to "the day before yesterday" and is used when Refers to two days before today. While 一昨日.
  • 明後日 (あさって (asatte) - Level: N5): Maps to "the day after tomorrow" and is used when Refers to two days after today. This is the common form for 'the day after tomorrow' in both spoken and written Japanese..
  • 一昨日 (おととい (ototoi) - Level: N4): Maps to "the day before yesterday" and is used when Refers to the day two days ago. Used for recent past events. Sometimes pronounced 'issakujitsu' in more formal contexts, but 'ototoi' is common for N4..
Mixing these up can easily lead to unnatural translations. Refer to the bilingual context cards below to master the boundaries!
Context for "日"
毎日日本語を勉強します。
I study Japanese every day.
Context for "曜日"
今日は何曜日ですか。
What day of the week is it today?
Context for "おととい"
おととい、友達と映画を見に行きました。
I went to see a movie with a friend the day before yesterday.
Context for "明後日"
明後日、大阪へ出張に行きます。
I will go on a business trip to Osaka the day after tomorrow.
Context for "一昨日"
一昨日、図書館で本を借りました。
I borrowed a book from the library the day before yesterday.

Synonym Mastery Challenge

Which Japanese word perfectly fits this blank space?

Fill in the blank: "毎 ___ ___ 本語を勉強します。" (Meaning: "I study Japanese every day.")
🎉 Correct Answer!

Remember: "日" is correct here because it represents "day, sun" in the context: "I study Japanese every day.".

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