It is a great honor and pleasure for cerebral infarction have been carried me to have Springer-Verlag publish out. Dr. Yoshimoto hoped that the this volume entitled "Treatment of results of research done in our depart­ Cerebral Infarction". I am much in­ ment over the last sixteen years con­ debted to my colleagues for my success cerning cerebral infarction could be in publishing this book. published. Moved by his enthusiasm, I have engaged in clinical work in my colleagues took their share in writ­ the field of neurosurgery for these few ing each article. I suggested to them decades and I have performed more that this volume should cover primarily than 5,000 major operations of intra­ the results of our own research, but that cranial surgery. Throughout this time, at the same time it should also include it has been my privilege to conduct a 2- the results of related work done by neurosurgical experts throughout the hour-morning research seminar in our department every Wednesday and to world. Therefore, I hope that this book supervise a great deal of research. At will interest many investigators who these seminars my fellow research have devoted themselves to research in workers and I have exchanged many the field of neuroscience. ideas about the study of neurosurgery My colleagues acknowledge that and we have designed many animal our research has been stimulated and experiments.