Seiji

“political second son”

Japan origin · Boy name

♂ 97% boys♀ 3% girls

#8804US 2023

9Births / yr

↑Rising

478All-time births

📅 Since 191400

How to pronounce Seiji

SAY·jee

/ˈseɪ.dʒiː/ · stress on SAY · 2 syllables

“political second son”

Japan origin · Boy name

What does Seiji mean and where does it come from?

Seiji (誠司) is a common masculine name in Japan. The characters used can vary, but common ones include 誠 (sei) meaning 'sincere' or 'truth' and 司 (ji) meaning 'to govern' or 'to administer.' This name can signify a person who is both truthful and holds a position of authority. Its popularity can be t

Cultural significance

Seiji has been a cherished name across cultures, particularly in Japan-speaking communities, where it reflects values of political second son.

Peak popularity

Reached #2558 in 1925 — currently #8804 in the US.

🌿

What middle names flow best with Seiji?

Seiji works best with short, strong middle names — one or two syllables keep the full name from becoming a mouthful

Seiji Grace

How popular is Seiji right now?

Rising fast — up 1859 spots — currently #8804 in the US out of 135.5k tracked names

US Trend 1920–2023#8804 · Top 6.5%

1920

1925

1970

1985

1990

1995

2000

2005

2010

2015

2020

2021

2022

2023

Year	US Rank	Births	vs Prior Year
2023	#8804	9	▲ up 1859 · +29% births
2022	#10663	7	▼ down 72
2021	#10591	7	▼ down 3097 · -30% births
2020	#7494	10	▼ down 399 · -9% births
2015	#7095	11	▼ down 365 · -8% births
2010	#6730	12	▼ down 802 · -8% births
2005	#5928	13	▲ up 2374 · +86% births
2000	#8302	7	▼ down 3741 · -46% births
1995	#4561	13	▲ up 3748 · +160% births
1990	#8309	5	▼ down 3509 · -37% births
1985	#4800	8	▲ up 129 · +60% births
1970	#4929	5	▼ down 2371 · -58% births
1925	#2558	12	▲ up 1479 · +100% births
1920	#4037	6	—

Name Popularity Timeline

Popularity Statistics for Seiji

Best Year1925Rank #2558

Peak Count13

Average Rank#6772

Current Trend↘Falling

Data Range1920 - 202314 years

The story of Seiji

Seiji entered American naming records in 1914 and has been in use for over 110 years. With 478 total births recorded, Seiji remains relatively uncommon. Once ranked #4037 in 1920, the name has become less common in recent years, sitting at #8804 in 2023.

Names that peaked alongside Seiji in 1925:

Robert John William James Charles

Seiji by decade

Seiji peaked in the 1920s. See all 1920s names →

Decade	Births
1910s	16
1920s	74
1930s	22
1970s	28
1980s	31
1990s	75
2000s ★	116
2010s	106
2020s	10

💎Seiji has only 478 total recorded births since 1914 — rarer than 99% of names in our database.

What are good nicknames for Seiji?

Common

SeiSeijSeijieSeijy

What names sound and feel like Seiji?

Based on sound, origin, and style — parents who love Seiji also consider these

Japanese · successful; period

Japan · A name meaning

Shuji

Japan · 修二

Common questions about the name Seiji

What does the name Seiji mean?

Seiji means "political second son" — a name rooted in Japan tradition that carries both historical depth and timeless appeal. The meaning reflects values that have made this name endure across generations.

How popular is the name Seiji?

Seiji is currently a distinctive and less common name as a boy name in the US and is rapidly gaining popularity — searches for Seiji have increased significantly in recent years.

What is the cultural origin of Seiji?

Seiji originates from Japan tradition. Japan names tend to carry strong cultural heritage and have spread across the world through migration, literature, and religion over centuries.

How do you pronounce the name Seiji?

Seiji is a two-syllable name pronounced S EY1 JH IY0. The pronunciation is straightforward for English speakers, and the name reads clearly on paper — an important practical consideration for parents.

Is Seiji trending right now?

Seiji is currently on the rise — it has gained significant momentum in recent years as parents discover its appeal.