Japanese Genealogy & Family History Blog

Guides on koseki research, Japanese ancestry, and tracing your family roots in Japan.

• Temple Registers (Kakucho) and Going Beyond the Koseki

  When koseki records end, temple death registers and local historical sources can push Japanese family history further back.

  Read more →

• How to Trace Japanese American Ancestry

  A practical starting guide for Japanese Americans beginning family history research with limited clues.

  Read more →

• What Is a Koseki? Japan’s Family Register Explained

  Learn how the Japanese family register (koseki) works and why it is the foundation of Japanese genealogy research.

  Read more →