hypothetical rule allowing inter-stable match-ups
Sumo term: a proposed or hypothetical rule that would permit match-ups between wrestlers regardless of their stable (heya) affiliation, which is normally restricted.
If the hypothetical inter-stable match-up rule were introduced, matches between wrestlers from the same stable would also become possible.
総当り is a general term for a round-robin tournament format, while 個人別総当り specifically refers to a sumo rule concept that would allow individual match-ups irrespective of stable affiliation.
Compound of 個人別 (individual-based) and 総当り (round-robin). The term is specific to sumo and describes a hypothetical rule change.