誠二

Seiji

boyJapanese

Seiji is a boy name of Japanese origin, meaning “Depends on kanji, e.g. sincere second son”.

MeaningDepends on kanji, e.g. sincere second son
GenderBoy
OriginJapanese
Written as誠二
PronunciationSAY-jee
TraditionModern & Classic
Used inJapan

Meaning and origin of Seiji

Seiji is a Japanese boys' name whose meaning depends on the characters chosen. A common spelling is 誠二, 'sincerity' plus 'two', traditionally used for a second son; others include 清二 ('pure' and 'two') or 政治, which also spells the word for politics. The conductor Seiji Ozawa, long music director of the Boston Symphony Orchestra, is a famous bearer.

Is Seiji a religious name?

Seiji has no particular religious association; Japanese given names are chosen for the meanings of their kanji rather than from Buddhist or Shinto sources.

How popular is Seiji?

A familiar but somewhat traditional boys' name in Japan.

Gifts with the name Seiji

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Spellings and variants of Seiji

SeiichiSeijiro

Names similar to Seiji

KenjiShinjiHarukiKenta

More boy names

Frequently asked questions

What does the name Seiji mean?

Seiji means 'Depends on kanji, e.g. sincere second son'. It is of Japanese origin.

Does Seiji have a religious meaning?

Seiji has no particular religious association; Japanese given names are chosen for the meanings of their kanji rather than from Buddhist or Shinto sources.

How do you pronounce Seiji?

Seiji is pronounced SAY-jee.

Is Seiji a boy or girl name?

Seiji is usually a boy name.

Updated October 2026. Spotted a mistake? Tell us.