Shinya Yamanaka: When I went to my second lab, in Nara, it was my first time to be the so-called “principal investigator.”  So I became independent for the first time in my scientific career.  That means I will have to have many students and many post-docs, so I thought I really have to have some wonderful research project in my own lab to attract as many people as possible. So I thought what the goal should be, and I thought making stem cells from patients’ own cells should be my goal.  That was the beginning of my full research.