We further genotyped the BACH2 rs3757247, the risk allele frequency of which is significantly different in risk allele frequency between the six patients with insulin‐triggered type 1 diabetes and 86 control Japanese participants using HapMap3‐JPT data in non‐diabetic control participants (n = 179), type 2 diabetes patients with insulin treatment (n = 154), and type 2 diabetes patients without insulin treatment (n = 152) at the Ehime University Hospital (Table 2). Here, INS is linked to type 1 diabetes mellitus.