In this study, we examined the association of polymorphisms within the CNDP1/CNDP2 locus with diabetic nephropathy in Japanese patients with type 2 diabetes, and found that a SNP in intron 5 of the CNDP1, rs12604675 (Figure S2), was nominally associated with overt proteinuria in Japanese women with type 2 diabetes. The gene discussed is CNDP2; the disease is diabetic kidney disease.