Roots Journal
Practical guides on koseki records, Japanese ancestry research, and tracing your Nikkei roots — written in English, for people who don't read Japanese.
13 articles
Not sure where to start looking?
Tell us what you know — even a single name or place is often enough. We'll outline what's possible, in English.

Adopted With Japanese Roots? Where to Start Your Search
2026.09.17

What Is a Kamon? Your Japanese Family Crest Explained
2026.09.16

Tracing Japanese Brazilian Ancestors: Where to Start
2026.09.15

Japanese American WWII Incarceration Records for Families
2026.09.14

What Is Honseki? Finding Your Ancestor's Registered Home
2026.09.11

Japanese Emigrant Ancestors: Records to Check Before Japan
2026.09.10

Japanese Ancestry in Your DNA Test? Next Steps That Work
2026.09.09

Who Can Request a Koseki? The Direct-Line Rule Explained
2026.09.04

What a Koseki Can and Can't Tell You About Your Ancestors
2026.09.03

How to Find Your Japanese Ancestors Without Reading Japanese
2026.09.02


