Isao

♂ Boy

How to Pronounce Isao

Pronounced ee-SAH-oh /iˈsɑoʊ/Low

Meaning: A traditional Japanese masculine name commonly associated with merit, achievement, or distinguished service; because Japanese names are written in kanji, the precise meaning depends on the characters a family selects.Low

In 30 seconds: Isao is a traditional Japanese boy's name usually connoting merit or achievement, a masculine virtue name whose exact sense depends on the kanji a family chooses.

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Origin MediumJapanese

MeaningA traditional Japanese masculine name commonly associated with merit, achievement, or distinguished service; because Japanese names are written in kanji, the precise meaning depends on the characters a family selects.

U.S. rank (2016)#12961 ↘ Falling

2016 U.S. births5 boys (0.00% of U.S. boys)

Peak year1925

Total births (all-time)≈ 246

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

Isao is a Japanese given name carried by boys in the early Issei and Nisei generations of Japanese Americans. Its common sense points to merit, honor, or achievement, but because it is written in kanji the meaning shifts with the characters a family chooses.

In United States records it appears only a handful of times a year, reflecting a small immigrant community rather than broad use. A man named Isao around its nineteen-twenties showing would be past a hundred now.

Did you know? Names like Isao appear in United States records during the Issei and Nisei era, when Japanese immigrant families were establishing themselves in America in the early twentieth century.

Overall data confidence 40%

References - Isao — General reference on Japanese given names and kanji-dependent meaning; Issei/Nisei immigration history.

Variations

IsamuIsao

Nicknames

Isa

Famous Bearers

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If you like Isao…

Hiroshi— A Japanese boy's name from the same early immigrant cohort.

Kenji— Shares the Japanese origin and virtue-name character.

Akira— Another traditional Japanese masculine given name.

Minoru— A period-typical Japanese boy's name with a hopeful sense.

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Frequently Asked

What does the name Isao mean?

Isao is a Japanese boy's name usually associated with merit, achievement, or honor; because it is written in kanji, the precise meaning depends on the characters chosen.

How do you pronounce Isao?

It is said ee-SAH-oh, with the stress on the middle syllable.

Is Isao a boy or girl name?

Isao is used as a boy's name in Japanese.

How popular is the name Isao?

Isao has always been rare in the United States, appearing a handful of times a year, mainly in the early twentieth century during the Issei and Nisei era.