億 — “hundred million” in Japanese

Grade 4おく

Radical ⼈ · radical 9 The building block this kanji is filed under

“hundred million” in Japanese is 億, read oku (おく). It is a Grade 4 Kyōiku kanji, taught in year 4 of Japanese elementary school, and appears in words such as 一億 (100 million).

Try it now

What does 億 mean?

Full details, readings & example

Kanji	億
Meaning	hundred million
Readings	おく
Grade	Grade 4 (Upper)
Curriculum	Kyōiku kanji · Japanese elementary school
Example	一億 (100 million)

How to read 億

億 is read oku (おく) depending on the word.

Words with 億

一億いちおく

Learn 億 in real sentences — free

Read stories and news built from only the kanji you already know. KanjiSchool’s path covers all 2,136 Jōyō kanji — 1,018 ready to learn now.

Start free — no credit card →

Kanji read the same way as 億

Same sound, different character — the classic trap. Compare them side by side:

Read this character in a real sentence

Updated: 2026-08-28