RIKEN Finds Third Ancestral Group in Japanese DNA
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- RIKEN researchers sequenced whole genomes of over 3,200 Japanese individuals from seven regions, creating one of the largest non‑European genome studies.
- Emishi ancestry was identified as a distinct third ancestral component in the Japanese gene pool, supporting a tripartite origins model.
- Japan shows fine‑scale subpopulation structure aligned with geography, indicating greater genetic diversity than previously thought.
- RIKEN also identified inherited Neanderthal and Denisovan DNA segments linked to increased risk of diabetes, heart disease, and cancer.
- JEWEL database was built to combine the genomic data with medical histories, enabling future research on genetics and health.
Why it matters: Japanese medical researchers and biotech firms gain a detailed genetic map linking archaic DNA to disease risk, enabling precision health strategies; the revised ancestry narrative reshapes cultural identity.
