Synonym Nuance VS
How to say "Reason" in Japanese
Both words can translate to "reason", but which should you choose?
Japanese Option A
わけ
わけ (wake)
N3 / CEFR Syllabus
VS
Japanese Option B
所以
ゆえん (yuen)
N1 / CEFR Syllabus
Nuance Contrast & Translation Difference
When translating "reason" into Japanese, you must choose carefully between わけ and 所以.
In Japanese, わけ (わけ (wake)) is typically associated with "reason, circumstances, meaning" (Syllabus Level: N3) and represents A versatile word implying 'reason', 'circumstance', or 'natural conclusion'. Often used in grammatical patterns like 〜わけだ.
On the other hand, 所以 (ゆえん (yuen)) maps to "reason; cause; origin; source; the reason why..." (Syllabus Level: N1) and represents A formal and somewhat literary term. Often used in the pattern 「〜の所以」 or 「〜する所以」 to explain the fundamental reason, origin, or essence of something, implying 'the very reason why something is as it is'.. A literal translation of "reason" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "わけ"
毎日運動しているから、体が健康なわけだ。
Because I exercise every day, it means my body is healthy (it's natural that my body is healthy).
Bilingual Context for "所以"
彼が成功した所以は、たゆまぬ努力にあった。
The reason he succeeded was his tireless effort.
Nuance Mastery Quiz
Which Japanese word perfectly fits this blank space?
Fill in the blank: "毎日運動しているから、体が健康な ＿＿＿ だ。" (Meaning: "Because I exercise every day, it means my body is healthy (it's natural that my body is healthy).")
🎉 Correct Answer!
Remember: "わけ" fits here because it means "reason, circumstances, meaning" in the context of: "Because I exercise every day, it means my body is healthy (it's natural that my body is healthy).". "所以" represents "reason; cause; origin; source; the reason why...".