Kazuo

♂ Boy

Pronounced kah-ZOO-oh /kɑːˈzuː.oʊ/Medium

Meaning: A traditional Japanese name whose meaning depends on the characters; it often reads 'first son' or 'harmonious man,' pairing the Kazu- element with -o ('man; husband'). Noted honestly.Low

In 30 seconds: A traditional Japanese name: Kazuo often means 'first son' or 'harmonious man' (said 'kah-ZOO-oh'). Meaningful and rare.

💕 Browse more names

Origin MediumJapanese

MeaningA traditional Japanese name whose meaning depends on the characters; it often reads 'first son' or 'harmonious man,' pairing the Kazu- element with -o ('man; husband'). Noted honestly.

U.S. rank (2009)#10458 ↗ Rising

2009 U.S. births7 boys (0.00% of U.S. boys)

Peak year1921

Total births (all-time)≈ 757

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Kazuo is the Japanese Kazu- element with -o ('man'), 'first son' or 'harmonious man' (character-dependent). It reads meaningful and distinctive - rare in the U.S. (said 'kah-ZOO-oh').

It appears only rarely in the U.S. Rare, traditional, and character-dependent.

Did you know? Kazuo traces to the Japanese Kazu- element with -o ('man'), 'first son' or 'harmonious man' (character-dependent) - a meaningful choice, rare in the U.S. (said 'kah-ZOO-oh').

Overall data confidence 45%

References - Kazuo — Japanese; often 'first/harmonious son'

Variations

KazuwoKazoKazuoh

Nicknames

KazZuo

Famous Bearers

Famous bearers coming soon.

If you like Kazuo…

Kenji— a like Japanese name

Hiro— a like Japanese pick

Kenzo— a like Japanese name

Ren— a like Japanese boys' name

Explore names like Kazuo

By themejapanese meaningful traditional character-dependent

All themes →All meanings →All origins →

Frequently Asked

What does the name Kazuo mean?

Kazuo is a Japanese name often reading 'first son' or 'harmonious man,' though the sense is character-dependent, which we note.

How do you pronounce Kazuo?

It's said kah-ZOO-oh /kɑːˈzuː.oʊ/ - 3 syllables, stress on the second.

Is Kazuo a boy or girl name?

It is used here as a boy's name.

How popular is Kazuo?

It is an extremely rare, newly emerging name in the U.S.