Japan: STR Allele Frequencies from Japan

In mispitools: Missing Person Identification Tools

STR Allele Frequencies from Japan

Description

Comprehensive population allele frequency data for 70 autosomal Short Tandem Repeat (STR) markers from the Japanese population. One of the most extensive STR frequency databases available for East Asian populations.

Usage

data(Japan)

Format

A data frame with 82 rows (alleles) and 71 columns. First column is Allele (repeat number), remaining columns are allele frequencies for each STR marker.

Details

This comprehensive dataset contains allele frequencies for 70 STR markers, matching the Chinese database in marker coverage. This enables high-powered comparisons and discrimination for Japanese individuals.

Core forensic markers included: CSF1PO, D1S1656, D2S441, D2S1338, D3S1358, D5S818, D7S820, D8S1179, D10S1248, D12S391, D13S317, D16S539, D18S51, D19S433, D21S11, D22S1045, FGA, TH01, TPOX, vWA, SE33.

Extended markers include: PENTA D, PENTA E, D6S1043, D4S2408, D9S1122, and many others for enhanced discrimination.

Source

Japanese population frequency data. Format compatible with pedtools and forrel packages.

References

Fujii K, et al. (2019). "Allele frequencies for 21 autosomal STR loci in the Japanese population." Legal Medicine, 36, 86-87. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1016/j.legalmed.2018.11.002")}

See Also

get_allele_freqs for extracting frequencies, sim_lr_genetic for LR simulations.

Other Asian databases: Asia, China

Examples

# Load the dataset
data(Japan)

# Compare with China database
data(China)
ncol(Japan) == ncol(China)  # TRUE - same number of columns

# Different number of alleles observed
nrow(Japan)  # 82 alleles
nrow(China)  # 67 alleles

mispitools documentation built on Aug. 26, 2026, 1:08 a.m.