The HLA-A2 (A*02:01)-restricted CTL epitopes of KIF20A were identified using HLA-A2 transgenic mice (Tgm) and the peptides were examined to check whether they could generate human CTLs exhibiting cytotoxic responses against KIF20A+, HLA-A2+ tumour cells in vitro. The gene discussed is KIF20A; the disease is neoplasm.