Admiral Yi Sun-sin's handwritten journal appeared during the Japanese invasion of Korea in 1592-1598. The document comprises seven volumes of almost daily records, covering the period from January 1592 to November 1598, and breaks off on the day of the death of Yi Sun-sin, on the eve of the decisive victory in the last naval battle of the war. This journal has no analogues in history, presenting detailed reports from the commander on the progress of military battles. Compiled in the form of a personal diary, the journal describes in detail the daily state of affairs at the fronts, the admiral’s own opinions and feelings, his observations regarding weather conditions, topographical characteristics of battle sites and the lives of ordinary people. The style of presentation used is simple and elegant. Currently, this diary is widely used both in Korea itself and in Western countries when studying the history of naval battles during the Seven Years' War. Contents: Preface 10 Lee Sunsin and his time (O.S. Pirozhenko) 12 Lee Sunsin. War diary (Nanzhong ilgi). TranslationChapter 1. The Year of Imjin (1592) 65Chapter 2. The Year of Kesa (1593) 83Chapter 3. The Year of Kabo (1594) 113Chapter 4. The Year of Eulmi (1595) 155Chapter 5. The Year of Pyongsin (1596) 199Chapter 6. The Year of Chongyu (1597) 237Chapter 7 Year of Muslim (1598) 274 Comments 279 Bibliography 325 Appendix: Appendix 1. Lee Sunsin. Brief bibliographical information 331Appendix 2. Lee Sunsin's family tree 333Appendix 3. Chronology of events of the Imjin War 334Appendix 4. Table of ranks and positions found in the text of the "War Diary" 340Appendix 5. Brief diagram of the organization of the Korean armed forces at the time of the Japanese invasion (1592) 344Appendix 6. Table of the main units of the Korean fleet during the Imjin War of 1592-1598 348Appendix 7. Counting the time of day in the text of the "War Diary" 353Glossary of basic Korean, Chinese and Japanese terms 354Index of geographical names 357Index of names 366Summary 375