調教師 (ちょうきょうし) is a Japanese term that translates to "trainer" in English, often used in the context of horse racing. A 調教師 is responsible for training racehorses, preparing them for competitions, and ensuring their physical and mental well-being. They develop training regimens, monitor the horses' health, and work closely with jockeys to optimize performance. In addition to training, 調教師 also plays a crucial role in selecting horses for races and managing their racing schedules. They must have a deep understanding of equine behavior and physiology, as well as knowledge of the racing industry, including regulations and strategies. This profession is vital for the success of both the horses and their owners in the competitive world of 競馬 (けいば), or horse racing.