Synonym Nuance VS
How to say "One" in Japanese
Both words can translate to "one", but which should you choose?
Japanese Option A
億
おく (oku)
N3 / CEFR Syllabus
VS
Japanese Option B
いちいち
いちいち (ichiichi)
N2 / CEFR Syllabus
Nuance Contrast & Translation Difference
When translating "one" into Japanese, you must choose carefully between 億 and いちいち.
In Japanese, 億 (おく (oku)) is typically associated with "one hundred million (100,000,000)" (Syllabus Level: N3) and represents A large numerical unit in Japanese. 1億 = 100,000,000. Often used for large amounts of money, population, or astronomical figures..
On the other hand, いちいち (いちいち (ichiichi)) maps to "one by one; in detail; item by item; minutely; every single time (often implies annoyance or unnecessary thoroughness)" (Syllabus Level: N2) and represents Implies going through things individually or paying attention to every small detail. Can convey a sense of annoyance when someone is being excessively meticulous or complaining about every little thing.. A literal translation of "one" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "億"
日本の人口は約1億2千万です。
Japan's population is approximately 120 million.
Bilingual Context for "いちいち"
彼は部下のやることに、いちいち口を出す。
He interferes with every single thing his subordinates do.
Nuance Mastery Quiz
Which Japanese word perfectly fits this blank space?
Fill in the blank: "日本の人口は約1 ＿＿＿ 2千万です。" (Meaning: "Japan's population is approximately 120 million.")
🎉 Correct Answer!
Remember: "億" fits here because it means "one hundred million (100,000,000)" in the context of: "Japan's population is approximately 120 million.". "いちいち" represents "one by one; in detail; item by item; minutely; every single time (often implies annoyance or unnecessary thoroughness)".