Yusuke Inoue1, Ryuma Shineha2, Yoshimi Yashiro3. 1. The Institute of Medical Science, The University of Tokyo, Shirokanedai 4-6-1, Minato, Tokyo 108-8639, Japan. Electronic address: yinoue-kyt@umin.ac.jp. 2. Faculty of Arts and Literature, Seijo University, Seijo 6-1-20, Setagaya, Tokyo 157-8511, Japan. 3. Uehiro Research Division for iPS Cell Ethics, Center for iPS Cell Research and Application (CiRA), Kyoto University, 53 Shogoin-Kawahara-cho, Sakyo, Kyoto 606-8507, Japan. Electronic address: yashiro.yoshimi@cira.kyoto-u.ac.jp.