Dr. Masashi Emoto is a professor of Gunma University Graduate School of Health Sciences in Japan. He got the professorship in 1993 and his main research theme is NKT cells. Before coming back to Japan, he has worked at Max Planck Institute for Infection Biology as a higher ranking senior scientist with Prof. Dr. Stefan H. E. Kaufman, who was a president of International Union of Immunological societies, and published many articles in prestigious journals with high impact factor. He has concentrated on identification of new natural ligand(s) for invariant NKT cells and nowadays he has succeeded to determine their chemical structures. Thus, he is a leading scientist in the field of NKT cells. Concerning to Bacteriology, he is an expert in the field of intracellular bacterial infection in particular Listeria and Salmonella as well as Mycobacteria. Dr. Emoto’s Research Interests include NKT cell, NK cell, Liver Immunology, Intestinal Intraepithelial Lymphocyte, Instracellular Bacteria, Listeria, Salmonella, Mycobacteria etc.