1. Field of play description/requirements

  1. For all Club-A and Club-B tournaments, the NSO combat surface regulations apply.
  2. The recommended size of the competition area is 8 m x 8 m with a three (3) metre outside safety zone and four (4) metres between adjacent combat areas.
  3. At a minimum, the size of the competition area is 7 m x 7 m with a three metre outside safety zone and three (3) metres between adjacent combat areas.

2. Field of play variations

  1. For competition between children U16 and younger, the combat area may be reduced to 6 m x 6 m. The safety zone remains three (3) metres all around.
  2. For competition between children U14 and younger, the minimum combat area may be reduced to 5 m x 5 m. The safety zone remains three (3) metres all around or 2 metres with padded walls.
  3. The safety zone may be reduced to two (2) metres for Ne Waza (ground fighting) competitions.