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Tadashi

♂ Boy

Pronounced tah-DAH-shee /tɑˈdɑ.ʃi/Medium

Meaning: From the Japanese Tadashi — 'loyal; correct; upright; faithful; just', depending on the kanjiLow

In 30 seconds: Loyal; correct; upright: Tadashi is Japanese. Crisp, classic, and warm (said 'tah-DAH-shee').

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Origin LowJapanese

MeaningFrom the Japanese Tadashi — 'loyal; correct; upright; faithful; just', depending on the kanji

U.S. rank (2025)#7620 ↗ Rising

2025 U.S. births11 boys (0.00% of U.S. boys)

Peak year1922

Total births (all-time)≈ 676

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

Tadashi comes from the Japanese Tadashi — 'loyal; correct; upright; faithful; just', depending on the kanji. A crisp, classic name (said 'tah-DAH-shee').

In the U.S. it appears in Japanese families. Rare, loyal-and-upright at the root, and crisp.

Did you know? Tadashi means 'loyal; correct; upright; faithful; just' in Japanese (depending on the kanji) — a crisp, classic name (said 'tah-DAH-shee').

Overall data confidence 40%

References — Tadashi — Japanese etymology

Variations

TadeshiTadashii

Nicknames

Tada

Famous Bearers

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If you like Tadashi…

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Yoshi— echoes that soft -hi sound

Akira— shares Tadashi's Japanese roots

Imari— another Japanese name

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Frequently Asked

What does the name Tadashi mean?

Tadashi is Japanese for 'loyal; correct; upright; faithful; just' (depending on the kanji).

How do you pronounce Tadashi?

It's said tah-DAH-shee /tɑˈdɑ.ʃi/ — three syllables, stress on the second.

Is Tadashi a boy or girl name?

Tadashi is a boy's name.

How popular is Tadashi?

Tadashi is a very rare name in the U.S.