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How to say "All" in Japanese

Both words can translate to "all", but which should you choose?

Japanese Option A

一斉に

いっせいに (issei ni)
N3 / CEFR Syllabus
VS
Japanese Option B

終日

しゅうじつ (shūjitsu)
N2 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "all" into Japanese, you must choose carefully between 一斉に and 終日. In Japanese, 一斉に (いっせいに (issei ni)) is typically associated with "all at once; simultaneously; in unison" (Syllabus Level: N3) and represents Used to describe an action performed by many people or things at the exact same time. Often conveys a sense of suddenness or uniformity.. On the other hand, 終日 (しゅうじつ (shūjitsu)) maps to "all day long, throughout the day" (Syllabus Level: N2) and represents Refers to the entire duration of a single day, from morning until night. Often used in schedules or announcements.. A literal translation of "all" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "一斉に"
合図と共に、選手たちは一斉にスタートした。
At the signal, the athletes all started at once.
Bilingual Context for "終日"
明日は終日外出します。
I will be out all day tomorrow.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "合図と共に、選手たちは ___ スタートした。" (Meaning: "At the signal, the athletes all started at once.")
🎉 Correct Answer!

Remember: "一斉に" fits here because it means "all at once; simultaneously; in unison" in the context of: "At the signal, the athletes all started at once.". "終日" represents "all day long, throughout the day".

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