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.
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Related Reading
Japan-origin baby names with timeless appeal
Browse names →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
Most popular combo · classic
Seiji Rose
Floral · soft ending
Seiji Mae
Sweet · timeless
Seiji Claire
French influence · crisp
Seiji Jane
Literary · strong
Seiji Skye
Modern · airy feel
How popular is Seiji right now?
Rising fast — up 1859 spots — currently #8804 in the US out of 135.5k tracked names
| 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 | — |
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:
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?
What names sound and feel like Seiji?
Based on sound, origin, and style — parents who love Seiji also consider these
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.