Koji vs Riku

Baby Name Comparison — 2026

Koji

Boy #4,251 Most Popular 2 Syllables

Meaning

"luminous second son"

Origin: Japanese ko (light) and ji (second son)

Cultural Roots

Japanese

Quick Stats

Popularity Rank
#4,251
Total SSA Count
25
Syllables
2
Formality
Moderate
Nicknames
Ko

Playground Safety Score

✓ All Clear
Full profile for Koji →

Popularity Comparison

Koji Rank #4,251
Riku Rank #4,341

Koji is more popular, ranked #4251 vs #4341 for Riku.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Koji ___

  • Koji James
  • Koji Alexander
  • Koji Lee
  • Koji Ren
  • Koji Kai
  • Koji Rio

Riku ___

  • Riku James
  • Riku Cole
  • Riku Alexander
  • Riku Thomas
  • Riku Kai
  • Riku Jun

Sibling Name Ideas

Names that pair well as siblings.

If you choose Koji

Hana Yuki Kenji Riku Saki

If you choose Riku

Kai Hana Sora Yuki Nao

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Koji or Riku more popular?

Koji is more popular, ranked #4251 compared to Riku at #4341 in the United States.

What do Koji and Riku mean?

Koji means "luminous second son" (Japanese ko (light) and ji (second son) origin). Riku means "strength, power" (Japanese origin).

Are Koji and Riku boy or girl names?

Koji is primarily a boy name. Riku is primarily a boy name.

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← Full profile: Koji ← Full profile: Riku Browse all baby names