[6] Back in the Netherlands in November, Bluming trained in Judo under Eddy Roosterman and the renowned G. F. M. Schutte at the Tung-Yang Club, gaining his black belt in three years.

[8] Upon his arrival to Japan, Bluming was accepted in the Kodokan Institute, where he trained under names like Toshiro Daigo, Yoshimi Osawa and Kazuo Ito.

[8] Being satisfied with his throws, he moved with the renowned Yaichihyōe Kanemitsu to perfect his groundwork, and around the same time he complemented his Judo training by learning Karate, Aikido, Iaijutsu, Bojutsu and Kendo under masters like Takaji Shimizu and Ichitaro Kuroda.

[7] Bluming gained his 4º dan after beating Akio Kaminaga by choke and Isao Inokuma by uchi mata makikomi.

Also under Donn's tutelage, Bluming underwent training to move to a heavier weight class, ascending from his natural 176 to 224 lb (80 to 102 kg).

This brought more success, as Bluming replaced Inokuma in a gonin gake (a Judo challenge against five opponents of 3rd Dan or higher) and accomplished a shocking record of four seconds.

[7] After his training in Japan, Bluming received a letter from the Netherlands in which Schutte asked him to come back and teach at the old dojo and the Amateurs Association for a year on contract.

Through Maeda, Masutatsu offered him to return as a trainer and mediator with Rings, which Bluming accepted on the condition to expel another of his enemies, Loek Hollander, from the school.