No 10th dans are alive, it's a rank given to dead judoka's out of respect for O'sensei Kano. To compete you have to know Japanese all the scoring is in Japanese, how did you get by? How long did you train to reach 5th dan? I've trained with the Open Japanese Judo Champ and he was only a 3rd dan and he's trained since the time he was 6. (over 20 years)