Quadruple VS
Synonym Boundary: "一", "一つ", "片道", "一因"
All represent the core concept "one", but require precise selection.
Japanese Option A
一
いち (ichi)
N5 / CEFR
Japanese Option B
一つ
ひとつ (hitotsu)
N5 / CEFR
Japanese Option C
片道
かたみち (katamichi)
N4 / CEFR
Japanese Option D
一因
いちいん (ichiin)
N2 / CEFR
Quadruple VS Nuance Contrast & Social Differences
When expressing "one" in Japanese, you must carefully distinguish between "一", "一つ", "片道", "一因" based on context.
- 一 (いち (ichi) - Level: N5): Maps to "one" and is used when 数を数えるときに使います。ひとつ、一人、一日など、他の言葉と組み合わせて使われることも多いです。/ Used for counting. Often combined with other words like 'hitotsu'.
- 一つ (ひとつ (hitotsu) - Level: N5): Maps to "one (general counter for objects)" and is used when Used for counting general items, especially small, individual objects, when a specific counter is not needed or known..
- 片道 (かたみち (katamichi) - Level: N4): Maps to "one way, single trip" and is used when Describes a journey to a destination without returning. Often used with きっぷ.
- 一因 (いちいん (ichiin) - Level: N2): Maps to "one cause; a contributing factor" and is used when Used to indicate one of several causes or factors contributing to a situation, often a negative one..
Context for "一"
りんごが一つあります。
There is one apple.
Context for "一つ"
りんごを一つください。
Please give me one apple.
Context for "片道"
彼は飛行機の片道チケットしか持っていませんでした。
He only had a one-way flight ticket.
Context for "一因"
彼の失敗は準備不足が一因だ。
His failure was partly due to insufficient preparation.
Synonym Mastery Challenge
Which Japanese word perfectly fits this blank space?
Fill in the blank: "りんごが ＿＿＿ つあります。" (Meaning: "There is one apple.")
🎉 Correct Answer!
Remember: "一" is correct here because it represents "one" in the context: "There is one apple.".