MEXT (17018018); SPS(17310114, 18370089, 22310120, 22657023); Hyogo Science and TechnologyAssociation (23I094) and the Institute of Medical Sci-ence, University of Tokyo (2010-(1)-102); Innovative Research Support Programs(Pilot Models) from the University of Tsukuba;Precursory Research for Embryonic Sci-ence and Technology from the Japan Science andTechnology Agency.