1000000000 in Japanese
十億
Updated May 2026
A billion: ten oku
NUMERAL
1,000,000,000
KANJI
十億
HIRAGANA
じゅうおく
ROMAJI
jū-oku
Real sentence examples
世界の人口は約八十億人です (sekai no jinkou wa yaku hachi-jū-oku-nin desu): the world's population is around 8 billion.
十億円の予算が組まれました (jū-oku-en no yosan ga kumaremashita): a 1 billion yen budget was prepared.
Pronunciation and morphology notes
One billion (English) is jū-oku in Japanese: ten oku, which is 10 x 100,000,000 = 1,000,000,000. There is no single Japanese word for “billion”. The boundary with the next major unit cho (兆, 10^12) comes at hyaku-oku (100 oku, 10 billion English) and sen-oku (1000 oku, 100 billion English); above that, switch to cho.
Related numbers
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