Otani left the British Judo Association[5][6][7] and, with his students founded an organisation with the goal of preserving and protecting the traditional form of judo established by Professor Jigoro Kano.

[8][4] The MOSJ would oversee a variety of judo clubs[9][10][11] and occasionally took part in Acton Carnival's parade.

[15][16][17] In 1955 Kenshiro Abbe arrived in Britain and reached out to Otani to assist him in creating his own organisation, which he named the 'British Judo Council'.

Students would practise both with the society and with Abbe's British Judo Council and gradually the two organisations worked parallel and held grading tournaments together.

[19] The MOSJ had over 8000 members[20] and in 1969, when Abbe returned to Japan, Otani became president of both organisations, before amalgamating them in 1970[3] - creating the modern day British Judo Council, which he ran as president.