Quadruple VS
Synonym Boundary: "一", "一つ", "億", "逐一"
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
億
おく (oku)
N3 / CEFR
Japanese Option D
逐一
ちくいち (chikuichi)
N2 / CEFR
Quadruple VS Nuance Contrast & Social Differences
When expressing "one" in Japanese, you must carefully distinguish between "一", "一つ", "億", "逐一" 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..
- 億 (おく (oku) - Level: N3): Maps to "one hundred million (100,000,000)" and is used when A large numerical unit in Japanese. 1億 = 100,000,000. Often used for large amounts of money, population, or astronomical figures..
- 逐一 (ちくいち (chikuichi) - Level: N2): Maps to "one by one, in detail, item by item" and is used when To do or report things individually, sequentially, and in full detail. It emphasizes meticulousness and thoroughness. Often used with verbs like 報告する.
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 "億"
日本の人口は約1億2千万です。
Japan's population is approximately 120 million.
Context for "逐一"
彼は出張の進捗状況を逐一報告してくれた。
He reported the progress of his business trip in detail, item by item.
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.".