億
億 — Hundred million
hundred million, 10**8
On’yomiオク (oku)
Kun’yomi—
Stroke order (15 strokes)
Watch the strokes draw themselves in the correct order — numbers mark where each stroke starts. Diagram from KanjiVG (CC BY-SA).
Common words using 億
| Word | Reading | Meaning |
|---|---|---|
| 一億 | いちおく ichioku | 100,000,000; one hundred million; 10^8 |
| 十億 | じゅうおく juuoku | 1,000,000,000; billion |
| 百億 | ひゃくおく hyakuoku | 10,000,000,000; ten billion |
| 数億年 | すうおくねん suuokunen | several hundred million years |
| 億 | おく oku | hundred million; 100,000,000; 10^8 |
| 億万 | おくまん okuman | millions and millions |
Study notes
億 is a JLPT N2 kanji written with 15 strokes. It is taught in Japanese elementary school (grade 4), so native children learn it early — a good sign it appears everywhere. Ranked #716 of the 2,500 most frequent kanji in newspapers. On’yomi (音読み) are Chinese-derived readings mostly used in compound words; kun’yomi (訓読み) are native Japanese readings, with any highlighted part written in hiragana after the kanji (okurigana).
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