Sumiyuki Kotani ( Kotani Sumiyuki 1903 October 19 1991) was a Japanese martial artist. He was one of the highest ranked judoka and was awarded a 10th dan in April 1984 by the Kodokan. He was for a long time the oldest 10th dan until Ichiro Abe was awarded the rank age of 83 years. Kotani studied at the Tokyo College of Education and studied judo directly under Jigoro Kano. As a young man he was known to take on any challenges. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Athlete