Table 1. Admixture events detected in the Japanese clusters.

Admixed cluster	Surrogate group approximating one admixture source
	C282 (Korean)		C284 (Han Chinese 1)		C291 (Han Chinese 2)		C280 (Vietnamese)
	Admixture time	P-value	Admixture time	P-value	Admixture time	P-value	Admixture time	P-value
Midland	52.0 ± 3.6	4.3E-17	49.9 ± 3.2	7.1E-36	53.5 ± 3.4	6.1E-25	56.9 ± 7.2	8.4E-10
Fukuoka	46.5 ± 3.9	2.0E-10	51.6 ± 5.4	2.9E-14	50.6 ± 6.8	1.4E-12	55.1 ± 10.6	3.0E-05
Ehime	50.5 ± 10.0	7.3E-04	37.6 ± 5.0	4.1E-13	47.8 ± 7.2	2.9E-10	42.8 ± 7.4	2.1E-03
Shimane 1	58.9 ± 13.1	3.3E-03	51.5 ± 8.4	4.9E-02	58.0 ± 8.8	5.6E-10	51.5 ± 8.4	9.9E-09
Shimane 2	33.8 ± 8.3	1.9E-03	46.8 ± 13.3	7.2E-03	44.7 ± 11.0	5.9E-04	40.9 ± 8.8	4.2E-05
Ryukyu 1	38.1 ± 2.2	7.2E-49	38.2 ± 2.2	3.0E-64	39.3 ± 1.9	1.9E-60	43.8 ± 2.3	1.0E-69
Ryukyu 2	43.1 ± 2.5	2.0E-36	43.5 ± 2.6	1.7E-50	41.4 ± 3.1	7.1E-39	41.5 ± 4.4	1.7E-20
Ryukyu 3	47.1 ± 9.2	4.1E-06	54.4 ± 9.4	9.5E-08	53.1 ± 8.1	8.4E-10	55.4 ± 13.3	3.5E-04
Ryukyu 4	43.2 ± 8.2	3.3E-05	54.0 ± 10.8	6.2E-06	54.8 ± 10.7	3.3E-06	56.0 ± 12.3	6.8E-05

Admixture time is shown in generations before present (estimate ± SE).

P-values are corrected for multiple testing by continental Asian reference clusters.