Complex sentence: Today in Japan more than seven thousand students study Kansuiryu Karate and compete in the Kansuiryu Full Contact Karate Championships, held during October each year, is one of the largest full contact tournaments in the country.
Split into simpler sentences: Today in Japan more than seven thousand students study Kansuiryu Karate and compete in the Kansuiryu Full Contact Karate Championships, held during October each year. It is one of the largest full contact tournaments in the country.